diff --git a/dur/.gitignore b/dur/.gitignore
new file mode 100644
index 0000000..2e64ef0
--- /dev/null
+++ b/dur/.gitignore
@@ -0,0 +1,2 @@
+bin/*
+coverage.*
diff --git a/dur/.golangci.yml b/dur/.golangci.yml
new file mode 100644
index 0000000..1269134
--- /dev/null
+++ b/dur/.golangci.yml
@@ -0,0 +1,94 @@
+linters-settings:
+  funlen:
+    lines: 100
+    statements: 450
+  golint:
+    min-confidence: 0
+  govet:
+    enable-all: true
+    disable:
+      - fieldalignment
+      - shadow
+  lll:
+    line-length: 80
+    tab-width: 4
+  maligned:
+    suggest-new: true
+  misspell:
+    locale: US
+  paralleltest:
+    ignore-missing: true
+
+linters:
+  disable-all: true
+  enable:
+    - asciicheck
+    - bodyclose
+    - depguard
+    - durationcheck
+    - errcheck
+    - errorlint
+    - exhaustive
+    - exportloopref
+    - funlen
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - godot
+    - gofumpt
+    - goimports
+    - goprintffuncname
+    - gosec
+    - gosimple
+    - govet
+    - importas
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - nilerr
+    - noctx
+    - nolintlint
+    - paralleltest
+    - prealloc
+    - predeclared
+    - revive
+    - rowserrcheck
+    - sqlclosecheck
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - wastedassign
+    - whitespace
+
+issues:
+  exclude:
+    - Using the variable on range scope `tt` in function literal
+    - Using the variable on range scope `tc` in function literal
+  exclude-rules:
+    - path: "_test\\.go"
+      linters:
+        - funlen
+        - dupl
+    - source: "^//go:generate "
+      linters:
+        - lll
+    - source: "`env:"
+      linters:
+        - lll
+    - source: "`json:"
+      linters:
+        - lll
+    - source: "`xml:"
+      linters:
+        - lll
+    - source: "`yaml:"
+      linters:
+        - lll
+
+run:
+  timeout: 2m
+  allow-parallel-runners: true
+  modules-download-mode: readonly
diff --git a/dur/Makefile b/dur/Makefile
new file mode 100644
index 0000000..8895cd7
--- /dev/null
+++ b/dur/Makefile
@@ -0,0 +1,191 @@
+GOMODNAME := $(shell grep 'module' go.mod | sed -e 's/^module //')
+SOURCES := $(shell find . -name "*.go" -or -name "go.mod" -or -name "go.sum" \
+	-or -name "Makefile" -or -name "*.golden")
+
+# Verbose output
+ifdef VERBOSE
+V = -v
+endif
+
+#
+# Environment
+#
+
+BINDIR := bin
+TOOLDIR := $(BINDIR)/tools
+
+# Global environment variables for all targets
+SHELL ?= /bin/bash
+SHELL := env \
+	GO111MODULE=on \
+	GOBIN=$(CURDIR)/$(TOOLDIR) \
+	CGO_ENABLED=1 \
+	PATH='$(CURDIR)/$(BINDIR):$(CURDIR)/$(TOOLDIR):$(PATH)' \
+	$(SHELL)
+
+#
+# Defaults
+#
+
+# Default target
+.DEFAULT_GOAL := test
+
+#
+# Tools
+#
+
+# external tool
+define tool # 1: binary-name, 2: go-import-path
+TOOLS += $(TOOLDIR)/$(1)
+
+$(TOOLDIR)/$(1): Makefile
+	GOBIN="$(CURDIR)/$(TOOLDIR)" go install "$(2)"
+endef
+
+$(eval $(call tool,godoc,golang.org/x/tools/cmd/godoc@latest))
+$(eval $(call tool,gofumpt,mvdan.cc/gofumpt@latest))
+$(eval $(call tool,goimports,golang.org/x/tools/cmd/goimports@latest))
+$(eval $(call tool,golangci-lint,github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50))
+$(eval $(call tool,gomod,github.com/Helcaraxan/gomod@latest))
+$(eval $(call tool,mockgen,github.com/golang/mock/mockgen@v1.6.0))
+
+.PHONY: tools
+tools: $(TOOLS)
+
+#
+# Development
+#
+
+BENCH ?= .
+TESTARGS ?=
+
+.PHONY: clean
+clean:
+	rm -f $(TOOLS)
+	rm -f ./coverage.out ./go.mod.tidy-check ./go.sum.tidy-check
+
+.PHONY: test
+test:
+	go test $(V) -count=1 -race $(TESTARGS) ./...
+
+.PHONY: test-deps
+test-deps:
+	go test all
+
+.PHONY: lint
+lint: $(TOOLDIR)/golangci-lint
+	golangci-lint $(V) run
+
+.PHONY: format
+format: $(TOOLDIR)/goimports $(TOOLDIR)/gofumpt
+	goimports -w . && gofumpt -w .
+
+.SILENT: bench
+.PHONY: bench
+bench:
+	go test $(V) -count=1 -bench=$(BENCH) $(TESTARGS) ./...
+
+#
+# Code Generation
+#
+
+.PHONY: generate
+generate: $(TOOLDIR)/mockgen
+	go generate ./...
+
+.PHONY: check-generate
+check-generate: $(TOOLDIR)/mockgen
+	$(eval CHKDIR := $(shell mktemp -d))
+	cp -av . "$(CHKDIR)"
+	make -C "$(CHKDIR)/" generate
+	( diff -rN . "$(CHKDIR)" && rm -rf "$(CHKDIR)" ) || \
+	( rm -rf "$(CHKDIR)" && exit 1 )
+
+#
+# Coverage
+#
+
+.PHONY: cov
+cov: coverage.out
+
+.PHONY: cov-html
+cov-html: coverage.out
+	go tool cover -html=./coverage.out
+
+.PHONY: cov-func
+cov-func: coverage.out
+	go tool cover -func=./coverage.out
+
+coverage.out: $(SOURCES)
+	go test $(V) -count=1 -race \
+		-covermode=atomic -coverprofile=./coverage.out ./...
+
+#
+# Dependencies
+#
+
+.PHONY: deps
+deps:
+	go mod download
+
+.PHONY: deps-update
+deps-update:
+	go get -u -t ./...
+
+.PHONY: deps-analyze
+deps-analyze: $(TOOLDIR)/gomod
+	gomod analyze
+
+.PHONY: tidy
+tidy:
+	go mod tidy $(V)
+
+.PHONY: verify
+verify:
+	go mod verify
+
+.SILENT: check-tidy
+.PHONY: check-tidy
+check-tidy:
+	cp go.mod go.mod.tidy-check
+	cp go.sum go.sum.tidy-check
+	go mod tidy
+	( \
+		diff go.mod go.mod.tidy-check && \
+		diff go.sum go.sum.tidy-check && \
+		rm -f go.mod go.sum && \
+		mv go.mod.tidy-check go.mod && \
+		mv go.sum.tidy-check go.sum \
+	) || ( \
+		rm -f go.mod go.sum && \
+		mv go.mod.tidy-check go.mod && \
+		mv go.sum.tidy-check go.sum; \
+		exit 1 \
+	)
+
+#
+# Documentation
+#
+
+# Serve docs
+.PHONY: docs
+docs: $(TOOLDIR)/godoc
+	$(info serviing docs on http://127.0.0.1:6060/pkg/$(GOMODNAME)/)
+	@godoc -http=127.0.0.1:6060
+
+#
+# Release
+#
+
+.PHONY: new-version
+new-version: check-npx
+	npx standard-version
+
+.PHONY: next-version
+next-version: check-npx
+	npx standard-version --dry-run
+
+.PHONY: check-npx
+check-npx:
+	$(if $(shell which npx),,\
+		$(error No npx found in PATH, please install NodeJS))
diff --git a/dur/dur.go b/dur/dur.go
new file mode 100644
index 0000000..4707459
--- /dev/null
+++ b/dur/dur.go
@@ -0,0 +1,11 @@
+// Package dur provides a wrapper dur.Duration around time.Duration, with
+// sensible JSON/YAML marshaling/unmarshaling support.
+//
+// Unmarshaling supports standard time.Duration formats string formats such as
+// "5s, ""1h30m", all parsed by time.ParseDuration. It also supports integer and
+// float values which are interpreted as seconds, rather than nanoseconds, like
+// the regular time.Duration does.
+//
+// Marshaling always outputs a string, using the standard time.Duration format,
+// by calling time.Duration(d).String().
+package dur
diff --git a/dur/duration.go b/dur/duration.go
new file mode 100644
index 0000000..d6b8aec
--- /dev/null
+++ b/dur/duration.go
@@ -0,0 +1,79 @@
+package dur
+
+import (
+	"encoding/json"
+	"strconv"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Duration is a wrapper around time.Duration that implements JSON and YAML
+// marshaler and unmarshaler interfaces.
+//
+// When unmarshaling, string values in JSON and YAML are parsed using
+// time.ParseDuration. Numeric values are parsed as number of seconds.
+//
+// When marshaling, the duration is formatted as a string using time.Duration's
+// String method.
+type Duration time.Duration
+
+// MarshalJSON implements the json.Marshaler interface, returning the duration
+// as a string in the format "1h2m3s", same as time.Duration.String().
+func (d Duration) MarshalJSON() ([]byte, error) {
+	return json.Marshal(time.Duration(d).String())
+}
+
+// UmarshalJSON implements the json.Unmarshaler interface. Supports string,
+// numeric JSON types, converting them to a Duration using ParseDuration.
+func (d *Duration) UnmarshalJSON(b []byte) error {
+	var x interface{}
+	if err := json.Unmarshal(b, &x); err != nil {
+		return err
+	}
+
+	pd, err := Parse(x)
+	if err != nil {
+		return err
+	}
+
+	*d = pd
+
+	return nil
+}
+
+// MarshalJSON implements the yaml.Marshaler interface, returning the duration
+// as a string in the format 1h2m3s, same as time.Duration.String().
+func (d Duration) MarshalYAML() (interface{}, error) {
+	return time.Duration(d).String(), nil
+}
+
+// UmarshalYAML implements the yaml.Unmarshaler interface. Supports string, int
+// and float YAML types, converting them to a Duration using ParseDuration.
+func (d *Duration) UnmarshalYAML(node *yaml.Node) error {
+	var x interface{}
+	var err error
+
+	switch node.Tag {
+	case "!!str":
+		x = node.Value
+	case "!!int":
+		x, err = strconv.Atoi(node.Value)
+	case "!!float":
+		x, err = strconv.ParseFloat(node.Value, 64)
+	default:
+		return &yaml.TypeError{Errors: []string{"invalid duration"}}
+	}
+	if err != nil {
+		return err
+	}
+
+	pd, err := Parse(x)
+	if err != nil {
+		return err
+	}
+
+	*d = pd
+
+	return nil
+}
diff --git a/dur/duration_example_test.go b/dur/duration_example_test.go
new file mode 100644
index 0000000..cc3ee18
--- /dev/null
+++ b/dur/duration_example_test.go
@@ -0,0 +1,72 @@
+package dur_test
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/jimeh/go-tyme/dur"
+	"gopkg.in/yaml.v3"
+)
+
+func ExampleDuration_MarshalJSON() {
+	type Connection struct {
+		Timeout dur.Duration `json:"timeout"`
+	}
+
+	conn := Connection{Timeout: dur.Duration(5 * time.Second)}
+	b, _ := json.Marshal(conn)
+
+	fmt.Println(string(b))
+	// Output:
+	// {"timeout":"5s"}
+}
+
+func ExampleDuration_UnmarshalJSON() {
+	type Connection struct {
+		Timeout dur.Duration `json:"timeout"`
+	}
+
+	conn := Connection{}
+	_ = json.Unmarshal([]byte(`{"timeout": "10s"}`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	_ = json.Unmarshal([]byte(`{"timeout": 5}`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	_ = json.Unmarshal([]byte(`{"timeout": 0.5}`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	// Output:
+	// 10000000000 (10s)
+	// 5000000000 (5s)
+	// 500000000 (500ms)
+}
+
+func ExampleDuration_MarshalYAML() {
+	type Connection struct {
+		Timeout dur.Duration `yaml:"timeout"`
+	}
+
+	conn := Connection{Timeout: dur.Duration(5 * time.Second)}
+	b, _ := yaml.Marshal(conn)
+
+	fmt.Println(string(b))
+	// Output:
+	// timeout: 5s
+}
+
+func ExampleDuration_UnmarshalYAML() {
+	type Connection struct {
+		Timeout dur.Duration `yaml:"timeout"`
+	}
+
+	conn := Connection{}
+	_ = yaml.Unmarshal([]byte(`timeout: 10s`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	_ = yaml.Unmarshal([]byte(`timeout: 5`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	_ = yaml.Unmarshal([]byte(`timeout: 0.5`), &conn)
+	fmt.Printf("%+v (%+v)\n", conn.Timeout, time.Duration(conn.Timeout))
+	// Output:
+	// 10000000000 (10s)
+	// 5000000000 (5s)
+	// 500000000 (500ms)
+}
diff --git a/dur/duration_test.go b/dur/duration_test.go
new file mode 100644
index 0000000..f367f36
--- /dev/null
+++ b/dur/duration_test.go
@@ -0,0 +1,344 @@
+package dur
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gopkg.in/yaml.v3"
+)
+
+func TestDuration_MarshalUnmarshalJSON(t *testing.T) {
+	tests := []struct {
+		name string
+		d    time.Duration
+	}{
+		{name: "zero", d: 0},
+		{name: "1ns", d: 1 * time.Nanosecond},
+		{name: "2ns", d: 2 * time.Nanosecond},
+		{name: "1µs", d: 1 * time.Microsecond},
+		{name: "2µs", d: 2 * time.Microsecond},
+		{name: "1ms", d: 1 * time.Millisecond},
+		{name: "2ms", d: 2 * time.Millisecond},
+		{name: "1s", d: 1 * time.Second},
+		{name: "2s", d: 2 * time.Second},
+		{name: "90s", d: 90 * time.Second},
+		{name: "1m", d: 1 * time.Minute},
+		{name: "2m", d: 2 * time.Minute},
+		{name: "90m", d: 90 * time.Minute},
+		{name: "1h", d: 1 * time.Hour},
+		{name: "2h", d: 2 * time.Hour},
+		{name: "36h", d: 36 * time.Hour},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := Duration(tt.d)
+
+			b, err := json.Marshal(d)
+			require.NoError(t, err)
+
+			var d2 Duration
+			err = json.Unmarshal(b, &d2)
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.d, time.Duration(d2))
+		})
+	}
+}
+
+func TestDuration_MarshalJSON(t *testing.T) {
+	tests := []struct {
+		name string
+		d    time.Duration
+		want string
+	}{
+		{name: "zero", d: 0, want: `"0s"`},
+		{name: "1ns", d: 1 * time.Nanosecond, want: `"1ns"`},
+		{name: "2ns", d: 2 * time.Nanosecond, want: `"2ns"`},
+		{name: "1µs", d: 1 * time.Microsecond, want: `"1µs"`},
+		{name: "2µs", d: 2 * time.Microsecond, want: `"2µs"`},
+		{name: "1ms", d: 1 * time.Millisecond, want: `"1ms"`},
+		{name: "2ms", d: 2 * time.Millisecond, want: `"2ms"`},
+		{name: "1s", d: 1 * time.Second, want: `"1s"`},
+		{name: "2s", d: 2 * time.Second, want: `"2s"`},
+		{name: "90s", d: 90 * time.Second, want: `"1m30s"`},
+		{name: "1m", d: 1 * time.Minute, want: `"1m0s"`},
+		{name: "2m", d: 2 * time.Minute, want: `"2m0s"`},
+		{name: "90m", d: 90 * time.Minute, want: `"1h30m0s"`},
+		{name: "1h", d: 1 * time.Hour, want: `"1h0m0s"`},
+		{name: "2h", d: 2 * time.Hour, want: `"2h0m0s"`},
+		{name: "36h", d: 36 * time.Hour, want: `"36h0m0s"`},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := Duration(tt.d)
+
+			b, err := json.Marshal(d)
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.want, string(b))
+		})
+	}
+}
+
+func TestDuration_UnmarshalJSON(t *testing.T) {
+	tests := []struct {
+		name    string
+		s       string
+		want    time.Duration
+		wantErr string
+	}{
+		{s: `"1ns"`, want: 1 * time.Nanosecond},
+		{s: `"2ns"`, want: 2 * time.Nanosecond},
+		{s: `"1µs"`, want: 1 * time.Microsecond},
+		{s: `"2µs"`, want: 2 * time.Microsecond},
+		{s: `"1ms"`, want: 1 * time.Millisecond},
+		{s: `"2ms"`, want: 2 * time.Millisecond},
+		{s: `"1s"`, want: 1 * time.Second},
+		{s: `"2s"`, want: 2 * time.Second},
+		{s: `"90s"`, want: 90 * time.Second},
+		{s: `"1m30s"`, want: 90 * time.Second},
+		{s: `"1m0s"`, want: 1 * time.Minute},
+		{s: `"2m0s"`, want: 2 * time.Minute},
+		{s: `"90m"`, want: 90 * time.Minute},
+		{s: `"1h30m"`, want: 90 * time.Minute},
+		{s: `"1h30m0s"`, want: 90 * time.Minute},
+		{s: `"1h0m0s"`, want: 1 * time.Hour},
+		{s: `"2h0m0s"`, want: 2 * time.Hour},
+		{s: `"36h0m0s"`, want: 36 * time.Hour},
+		{s: "0.000000001", want: 1 * time.Nanosecond},
+		{s: "0.000001", want: 1 * time.Microsecond},
+		{s: "0.001", want: 1 * time.Millisecond},
+		{s: "0.1", want: 100 * time.Millisecond},
+		{s: "1", want: 1 * time.Second},
+		{s: "1.0", want: 1 * time.Second},
+		{s: "2.0", want: 2 * time.Second},
+		{s: "90", want: 90 * time.Second},
+		{s: "90.001", want: (90 * time.Second) + (1 * time.Millisecond)},
+		{s: "90.999", want: (90 * time.Second) + (999 * time.Millisecond)},
+		{name: "empty", s: "", wantErr: "unexpected end of JSON input"},
+		{
+			s:       "'2ms'",
+			wantErr: "invalid character '\\'' looking for beginning of value",
+		},
+		{
+			s:       "nil",
+			wantErr: "invalid character 'i' in literal null (expecting 'u')",
+		},
+		{s: `"nil"`, wantErr: "time: invalid duration \"nil\""},
+		{
+			s:       "foo",
+			wantErr: "invalid character 'o' in literal false (expecting 'a')",
+		},
+		{s: `"foo"`, wantErr: "time: invalid duration \"foo\""},
+		{s: "null", wantErr: "time: invalid duration <nil>"},
+		{s: `"null"`, wantErr: "time: invalid duration \"null\""},
+	}
+	for _, tt := range tests {
+		name := tt.name
+		if name == "" {
+			name = tt.s
+		}
+
+		t.Run(name, func(t *testing.T) {
+			var d Duration
+
+			err := json.Unmarshal([]byte(tt.s), &d)
+			if tt.wantErr != "" {
+				assert.EqualError(t, err, tt.wantErr)
+			} else {
+				require.NoError(t, err)
+			}
+
+			assert.Equal(t, tt.want, time.Duration(d))
+		})
+	}
+}
+
+func TestDuration_MarshalUnmarshalYAML(t *testing.T) {
+	tests := []struct {
+		name string
+		d    time.Duration
+	}{
+		{name: "zero", d: 0},
+		{name: "1ns", d: 1 * time.Nanosecond},
+		{name: "2ns", d: 2 * time.Nanosecond},
+		{name: "1µs", d: 1 * time.Microsecond},
+		{name: "2µs", d: 2 * time.Microsecond},
+		{name: "1ms", d: 1 * time.Millisecond},
+		{name: "2ms", d: 2 * time.Millisecond},
+		{name: "1s", d: 1 * time.Second},
+		{name: "2s", d: 2 * time.Second},
+		{name: "90s", d: 90 * time.Second},
+		{name: "1m", d: 1 * time.Minute},
+		{name: "2m", d: 2 * time.Minute},
+		{name: "90m", d: 90 * time.Minute},
+		{name: "1h", d: 1 * time.Hour},
+		{name: "2h", d: 2 * time.Hour},
+		{name: "36h", d: 36 * time.Hour},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := Duration(tt.d)
+
+			b, err := yaml.Marshal(d)
+			require.NoError(t, err)
+
+			var d2 Duration
+			err = yaml.Unmarshal(b, &d2)
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.d, time.Duration(d2))
+		})
+	}
+}
+
+func TestDuration_MarshalYAML(t *testing.T) {
+	tests := []struct {
+		name string
+		d    time.Duration
+		want string
+	}{
+		{name: "zero", d: 0, want: "0s\n"},
+		{name: "1ns", d: 1 * time.Nanosecond, want: "1ns\n"},
+		{name: "2ns", d: 2 * time.Nanosecond, want: "2ns\n"},
+		{name: "1µs", d: 1 * time.Microsecond, want: "1µs\n"},
+		{name: "2µs", d: 2 * time.Microsecond, want: "2µs\n"},
+		{name: "1ms", d: 1 * time.Millisecond, want: "1ms\n"},
+		{name: "2ms", d: 2 * time.Millisecond, want: "2ms\n"},
+		{name: "1s", d: 1 * time.Second, want: "1s\n"},
+		{name: "2s", d: 2 * time.Second, want: "2s\n"},
+		{name: "90s", d: 90 * time.Second, want: "1m30s\n"},
+		{name: "1m", d: 1 * time.Minute, want: "1m0s\n"},
+		{name: "2m", d: 2 * time.Minute, want: "2m0s\n"},
+		{name: "90m", d: 90 * time.Minute, want: "1h30m0s\n"},
+		{name: "1h", d: 1 * time.Hour, want: "1h0m0s\n"},
+		{name: "2h", d: 2 * time.Hour, want: "2h0m0s\n"},
+		{name: "36h", d: 36 * time.Hour, want: "36h0m0s\n"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			d := Duration(tt.d)
+
+			b, err := yaml.Marshal(d)
+			require.NoError(t, err)
+
+			assert.Equal(t, tt.want, string(b))
+		})
+	}
+}
+
+func TestDuration_UnmarshalYAML(t *testing.T) {
+	tests := []struct {
+		name    string
+		s       string
+		want    time.Duration
+		wantErr string
+	}{
+		{s: `"1ns"`, want: 1 * time.Nanosecond},
+		{s: `"2ns"`, want: 2 * time.Nanosecond},
+		{s: `"1µs"`, want: 1 * time.Microsecond},
+		{s: `"2µs"`, want: 2 * time.Microsecond},
+		{s: `"1ms"`, want: 1 * time.Millisecond},
+		{s: `"2ms"`, want: 2 * time.Millisecond},
+		{s: `"1s"`, want: 1 * time.Second},
+		{s: `"2s"`, want: 2 * time.Second},
+		{s: `"90s"`, want: 90 * time.Second},
+		{s: `"1m30s"`, want: 90 * time.Second},
+		{s: `"1m0s"`, want: 1 * time.Minute},
+		{s: `"2m0s"`, want: 2 * time.Minute},
+		{s: `"90m"`, want: 90 * time.Minute},
+		{s: `"1h30m"`, want: 90 * time.Minute},
+		{s: `"1h30m0s"`, want: 90 * time.Minute},
+		{s: `"1h0m0s"`, want: 1 * time.Hour},
+		{s: `"2h0m0s"`, want: 2 * time.Hour},
+		{s: `"36h0m0s"`, want: 36 * time.Hour},
+		{s: "'1ns'", want: 1 * time.Nanosecond},
+		{s: "'2ns'", want: 2 * time.Nanosecond},
+		{s: "'1µs'", want: 1 * time.Microsecond},
+		{s: "'2µs'", want: 2 * time.Microsecond},
+		{s: "'1ms'", want: 1 * time.Millisecond},
+		{s: "'2ms'", want: 2 * time.Millisecond},
+		{s: "'1s'", want: 1 * time.Second},
+		{s: "'2s'", want: 2 * time.Second},
+		{s: "'90s'", want: 90 * time.Second},
+		{s: "'1m30s'", want: 90 * time.Second},
+		{s: "'1m0s'", want: 1 * time.Minute},
+		{s: "'2m0s'", want: 2 * time.Minute},
+		{s: "'90m'", want: 90 * time.Minute},
+		{s: "'1h30m'", want: 90 * time.Minute},
+		{s: "'1h30m0s'", want: 90 * time.Minute},
+		{s: "'1h0m0s'", want: 1 * time.Hour},
+		{s: "'2h0m0s'", want: 2 * time.Hour},
+		{s: "'36h0m0s'", want: 36 * time.Hour},
+		{s: "1ns", want: 1 * time.Nanosecond},
+		{s: "2ns", want: 2 * time.Nanosecond},
+		{s: "1µs", want: 1 * time.Microsecond},
+		{s: "2µs", want: 2 * time.Microsecond},
+		{s: "1ms", want: 1 * time.Millisecond},
+		{s: "2ms", want: 2 * time.Millisecond},
+		{s: "1s", want: 1 * time.Second},
+		{s: "2s", want: 2 * time.Second},
+		{s: "90s", want: 90 * time.Second},
+		{s: "1m30s", want: 90 * time.Second},
+		{s: "1m0s", want: 1 * time.Minute},
+		{s: "2m0s", want: 2 * time.Minute},
+		{s: "90m", want: 90 * time.Minute},
+		{s: "1h30m", want: 90 * time.Minute},
+		{s: "1h30m0s", want: 90 * time.Minute},
+		{s: "1h0m0s", want: 1 * time.Hour},
+		{s: "2h0m0s", want: 2 * time.Hour},
+		{s: "36h0m0s", want: 36 * time.Hour},
+		{name: "empty", s: "", want: 0},
+		{s: "nil", wantErr: "time: invalid duration \"nil\""},
+		{s: "foo", wantErr: "time: invalid duration \"foo\""},
+		{s: "null", want: 0},
+		{s: "0.000000001", want: 1 * time.Nanosecond},
+		{s: "0.000001", want: 1 * time.Microsecond},
+		{s: "0.001", want: 1 * time.Millisecond},
+		{s: "0.1", want: 100 * time.Millisecond},
+		{s: "1", want: 1 * time.Second},
+		{s: "1.0", want: 1 * time.Second},
+		{s: "2.0", want: 2 * time.Second},
+		{s: "90", want: 90 * time.Second},
+		{s: "90.001", want: (90 * time.Second) + (1 * time.Millisecond)},
+		{s: "90.999", want: (90 * time.Second) + (999 * time.Millisecond)},
+		{s: "yes", wantErr: "time: invalid duration \"yes\""},
+		{s: "no", wantErr: "time: invalid duration \"no\""},
+		{s: "true", wantErr: "yaml: unmarshal errors:\n  invalid duration"},
+		{s: "false", wantErr: "yaml: unmarshal errors:\n  invalid duration"},
+		{
+			s:       "[foo, bar]",
+			wantErr: "yaml: unmarshal errors:\n  invalid duration",
+		},
+		{
+			s:       "{foo: bar}",
+			wantErr: "yaml: unmarshal errors:\n  invalid duration",
+		},
+		{
+			s:       "2001-12-15T02:59:43.1Z",
+			wantErr: "yaml: unmarshal errors:\n  invalid duration",
+		},
+	}
+	for _, tt := range tests {
+		name := tt.name
+		if name == "" {
+			name = tt.s
+		}
+
+		t.Run(name, func(t *testing.T) {
+			var d Duration
+
+			err := yaml.Unmarshal([]byte(tt.s), &d)
+			if tt.wantErr != "" {
+				assert.EqualError(t, err, tt.wantErr)
+			} else {
+				require.NoError(t, err)
+			}
+
+			assert.Equal(t, tt.want, time.Duration(d))
+		})
+	}
+}
diff --git a/dur/go.mod b/dur/go.mod
new file mode 100644
index 0000000..f182c64
--- /dev/null
+++ b/dur/go.mod
@@ -0,0 +1,13 @@
+module github.com/jimeh/go-tyme/dur
+
+go 1.18
+
+require (
+	github.com/stretchr/testify v1.8.1
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+)
diff --git a/dur/go.sum b/dur/go.sum
new file mode 100644
index 0000000..2ec90f7
--- /dev/null
+++ b/dur/go.sum
@@ -0,0 +1,17 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/dur/parse.go b/dur/parse.go
new file mode 100644
index 0000000..031f573
--- /dev/null
+++ b/dur/parse.go
@@ -0,0 +1,33 @@
+package dur
+
+import (
+	"fmt"
+	"time"
+)
+
+const floatSecond = float64(time.Second)
+
+// Parse parses given interface to a Duration.
+//
+// If the interface is a string, it will be parsed using time.Parse. If
+// the interface is a int or float64, it will be parsed as a number of seconds.
+func Parse(x interface{}) (Duration, error) {
+	var d Duration
+	switch value := x.(type) {
+	case string:
+		td, err := time.ParseDuration(value)
+		if err != nil {
+			return 0, err
+		}
+
+		d = Duration(td)
+	case float64:
+		d = Duration(time.Duration(value * floatSecond))
+	case int:
+		d = Duration(time.Duration(value) * time.Second)
+	default:
+		return 0, fmt.Errorf("time: invalid duration %+v", x)
+	}
+
+	return d, nil
+}
diff --git a/dur/parse_test.go b/dur/parse_test.go
new file mode 100644
index 0000000..7331249
--- /dev/null
+++ b/dur/parse_test.go
@@ -0,0 +1,74 @@
+package dur
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParse(t *testing.T) {
+	tests := []struct {
+		name    string
+		x       interface{}
+		want    time.Duration
+		wantErr string
+	}{
+		{x: "1ns", want: 1 * time.Nanosecond},
+		{x: "2ns", want: 2 * time.Nanosecond},
+		{x: "1µs", want: 1 * time.Microsecond},
+		{x: "2µs", want: 2 * time.Microsecond},
+		{x: "1ms", want: 1 * time.Millisecond},
+		{x: "2ms", want: 2 * time.Millisecond},
+		{x: "1s", want: 1 * time.Second},
+		{x: "2s", want: 2 * time.Second},
+		{x: "90s", want: 90 * time.Second},
+		{x: "1m30s", want: 90 * time.Second},
+		{x: "1m0s", want: 1 * time.Minute},
+		{x: "2m0s", want: 2 * time.Minute},
+		{x: "90m", want: 90 * time.Minute},
+		{x: "1h30m", want: 90 * time.Minute},
+		{x: "1h30m0s", want: 90 * time.Minute},
+		{x: "1h0m0s", want: 1 * time.Hour},
+		{x: "2h0m0s", want: 2 * time.Hour},
+		{x: "36h0m0s", want: 36 * time.Hour},
+		{x: 0.000000001, want: 1 * time.Nanosecond},
+		{x: 0.000001, want: 1 * time.Microsecond},
+		{x: 0.001, want: 1 * time.Millisecond},
+		{x: 0.1, want: 100 * time.Millisecond},
+		{x: 1, want: 1 * time.Second},
+		{x: 1.0, want: 1 * time.Second},
+		{x: 2.0, want: 2 * time.Second},
+		{x: 90, want: 90 * time.Second},
+		{x: 90.001, want: (90 * time.Second) + (1 * time.Millisecond)},
+		{x: 90.999, want: (90 * time.Second) + (999 * time.Millisecond)},
+		{name: "nil", x: nil, wantErr: "time: invalid duration <nil>"},
+		{name: "empty string", x: "", wantErr: "time: invalid duration \"\""},
+		{x: "'2ms'", wantErr: "time: invalid duration \"'2ms'\""},
+		{x: "nil", wantErr: "time: invalid duration \"nil\""},
+		{x: "foo", wantErr: "time: invalid duration \"foo\""},
+		{x: "\"foo\"", wantErr: "time: invalid duration \"\\\"foo\\\"\""},
+		{x: "null", wantErr: "time: invalid duration \"null\""},
+		{x: "\"null\"", wantErr: "time: invalid duration \"\\\"null\\\"\""},
+	}
+	for _, tt := range tests {
+		name := tt.name
+		if name == "" {
+			name = fmt.Sprintf("%#v", tt.x)
+		}
+
+		t.Run(name, func(t *testing.T) {
+			got, err := Parse(tt.x)
+
+			if tt.wantErr != "" {
+				assert.EqualError(t, err, tt.wantErr)
+			} else {
+				require.NoError(t, err)
+			}
+
+			assert.Equal(t, tt.want, time.Duration(got))
+		})
+	}
+}
diff --git a/go.work b/go.work
new file mode 100644
index 0000000..d3de252
--- /dev/null
+++ b/go.work
@@ -0,0 +1,6 @@
+go 1.19
+
+use (
+	.
+	./dur
+)
diff --git a/go.work.sum b/go.work.sum
new file mode 100644
index 0000000..5482b9e
--- /dev/null
+++ b/go.work.sum
@@ -0,0 +1,4 @@
+github.com/mattn/go-runewidth v0.0.10 h1:CoZ3S2P7pvtP45xOtBw+/mDL2z0RKI576gSkzRRpdGg=
+github.com/rivo/uniseg v0.1.0 h1:+2KBaVoUmb9XzDsrx/Ct0W/EYOSFf/nWTauy++DprtY=
+github.com/scylladb/termtables v0.0.0-20191203121021-c4c0b6d42ff4 h1:8qmTC5ByIXO3GP/IzBkxcZ/99VITvnIETDhdFz/om7A=
+github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=