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@northguild/gmt
Temporal-first date and time utilities with timezone support and polyfill integration.
- Authority
- 45 reach 0 · trust 5 · quality 25 · freshness 15
- Tier
- listed
- llms.txt
- https://northguild.dev/gmt/llms.txt
- llms-full.txt
- https://northguild.dev/gmt/llms-full.txt
- Sections
- 23
- Links
- 924
- Size
- 183974 bytes
- Registered
- 2026-10-04
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-23T14:04:37.562Z
- Last checked
- 2026-10-23T14:04:38.964Z
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Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-23T14:04:37.570Z. Cached copy · Source on northguild.dev
# @northguild/gmt
> Temporal-first date and time utilities with timezone support and polyfill integration.
## Reference
- [API reference](https://northguild.dev/gmt/reference.md): Index of every namespace, with links to each module and to the shared types.
## Reference — calendar
- [addOperatingTime](https://northguild.dev/gmt/reference/calendar/hours/addOperatingTime.md): Return the instant at which `duration` of open time has elapsed since `start`: the deadline of a service level measured in working hours.
- [bucketRange](https://northguild.dev/gmt/reference/calendar/calculate/bucketRange.md): Return the start instant of every `unit` bucket the half-open range `[start, end)` touches, bucketed **in `timeZone`**.
- [buildBusinessCalendar](https://northguild.dev/gmt/reference/calendar/rules/buildBusinessCalendar.md): Expand holiday rules into a `BusinessCalendar` for a range of years.
- [businessDaysBetween](https://northguild.dev/gmt/reference/calendar/business/businessDaysBetween.md): Count the working days between two local dates, **excluding `start` and including `end`**.
- [easterSunday](https://northguild.dev/gmt/reference/calendar/rules/easterSunday.md): Easter Sunday of a year as an ISO date, by the Gregorian computus unless the Julian one is asked for.
- [floorToZone](https://northguild.dev/gmt/reference/calendar/calculate/floorToZone.md): Floor an instant to the start of the `unit` containing it **in `timeZone`**, and return the instant of that boundary.
- [getFiscalPeriod](https://northguild.dev/gmt/reference/calendar/calculate/getFiscalPeriod.md): Return the fiscal year, period and week `value` falls in, for a 52/53-week retail calendar.
- [getIsoWeekDate](https://northguild.dev/gmt/reference/calendar/calculate/getIsoWeekDate.md): Return the ISO 8601 week date — week-numbering year, week and weekday — for `value`.
- [getOrdinalDate](https://northguild.dev/gmt/reference/calendar/calculate/getOrdinalDate.md): Return the ISO 8601 ordinal date — calendar year and day of year — for `value`.
- [getQuarter](https://northguild.dev/gmt/reference/calendar/calculate/getQuarter.md): Return the quarter `value` falls in, as a year and a quarter number.
- [holidayDates](https://northguild.dev/gmt/reference/calendar/rules/holidayDates.md): Every date a holiday rule produces in an ISO year, as sorted ISO PlainDate strings.
- [isOpenAt](https://northguild.dev/gmt/reference/calendar/hours/isOpenAt.md): Return true when `schedule` is open at the instant `isoString`.
- [isValidBusinessCalendar](https://northguild.dev/gmt/reference/calendar/validate/isValidBusinessCalendar.md): Return true when `calendar` is a `BusinessCalendar` the business-day functions accept.
- [isValidFiscalCalendar](https://northguild.dev/gmt/reference/calendar/validate/isValidFiscalCalendar.md): Return true when `calendar` is a `FiscalCalendar` that `getFiscalPeriod` accepts.
- [isValidFiscalExtraWeek](https://northguild.dev/gmt/reference/calendar/validate/isValidFiscalExtraWeek
…Machine-readable: GET /v1/resolve?q=northguild.dev · GET /v1/domain/northguild.dev · this page as Accept: application/json or text/markdown · MCP lookup_domain
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