[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › Time Time representations, durations, and scheduling utilities. ## Functions | Function | Description | | ------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------- | | [createTime](https://evolu.dev/docs/api-reference/common/Time/functions/createTime) | Creates a [Time](https://evolu.dev/docs/api-reference/common/Time/interfaces/Time) using `Date.now()` and `globalThis.setTimeout`. | | [durationToMillis](https://evolu.dev/docs/api-reference/common/Time/functions/durationToMillis) | Converts a duration to milliseconds. | | [formatMillisAsClockTime](https://evolu.dev/docs/api-reference/common/Time/functions/formatMillisAsClockTime) | Formats [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) as `HH:MM:SS.mmm`. | | [formatMillisAsDuration](https://evolu.dev/docs/api-reference/common/Time/functions/formatMillisAsDuration) | Formats [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) as a human-readable duration string. | | [millisToDateIso](https://evolu.dev/docs/api-reference/common/Time/functions/millisToDateIso) | Converts [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) to [DateIso](https://evolu.dev/docs/api-reference/common/Type/variables/DateIso). | | [setTimeout](https://evolu.dev/docs/api-reference/common/Time/functions/setTimeout) | Returns a Promise that resolves after the specified duration. | | [testCreateTime](https://evolu.dev/docs/api-reference/common/Time/functions/testCreateTime) | Creates a [TestTime](https://evolu.dev/docs/api-reference/common/Time/interfaces/TestTime) with controllable timers for testing. | ## Interfaces | Interface | Description | | ------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ | | [TestTime](https://evolu.dev/docs/api-reference/common/Time/interfaces/TestTime) | Test [Time](https://evolu.dev/docs/api-reference/common/Time/interfaces/Time) with controllable timers. | | [TestTimeDep](https://evolu.dev/docs/api-reference/common/Time/interfaces/TestTimeDep) | - | | [Time](https://evolu.dev/docs/api-reference/common/Time/interfaces/Time) | Time and timer operations. | | [TimeDep](https://evolu.dev/docs/api-reference/common/Time/interfaces/TimeDep) | - | ## Type Aliases | Type Alias | Description | | ----------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [Duration](https://evolu.dev/docs/api-reference/common/Time/type-aliases/Duration) | Duration can be either a [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral) or milliseconds as [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis). | | [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral) | Duration literal with compile-time validation. | | [DurationLiteralDays](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralDays) | Days duration: `"1d"` to `"6d"` or `"1.1d"` to `"6.9d"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralHours](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralHours) | Hours duration: `"1h"` to `"23h"` or `"1.1h"` to `"23.9h"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralMilliseconds](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralMilliseconds) | Milliseconds duration: `"1ms"` to `"999ms"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralMinutes](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralMinutes) | Minutes duration: `"1m"` to `"59m"` or `"1.1m"` to `"59.9m"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralSeconds](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralSeconds) | Seconds duration: `"1s"` to `"59s"` or `"1.1s"` to `"59.9s"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralWeeks](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralWeeks) | Weeks duration: `"1w"` to `"51w"` or `"1.1w"` to `"51.9w"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [DurationLiteralYears](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteralYears) | Years duration: `"1y"` to `"99y"` or `"1.1y"` to `"99.9y"`. See [DurationLiteral](https://evolu.dev/docs/api-reference/common/Time/type-aliases/DurationLiteral). | | [Millis](https://evolu.dev/docs/api-reference/common/Time/type-aliases/Millis) | Milliseconds timestamp, like `Date.now()`. | | [TimeoutId](https://evolu.dev/docs/api-reference/common/Time/type-aliases/TimeoutId) | Opaque type for timeout handles. | ## Variables | Variable | Description | | ---------------------------------------------------------------------- | ----------------------------------------------------------------------------- | | [maxMillis](https://evolu.dev/docs/api-reference/common/Time/variables/maxMillis) | Maximum [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) value. | | [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) | Milliseconds timestamp, like `Date.now()`. | | [minMillis](https://evolu.dev/docs/api-reference/common/Time/variables/minMillis) | Minimum [Millis](https://evolu.dev/docs/api-reference/common/Time/variables/Millis) value. | | [ms120fps](https://evolu.dev/docs/api-reference/common/Time/variables/ms120fps) | Frame budget at 120fps (8ms). | | [ms60fps](https://evolu.dev/docs/api-reference/common/Time/variables/ms60fps) | Frame budget at 60fps (16ms). | | [msLongTask](https://evolu.dev/docs/api-reference/common/Time/variables/msLongTask) | Long task threshold (50ms). |