ChronosChronos
ChronosQuery/Checker Methods

isDST

Checks if a date falls within a Daylight Saving Time period.

isDST()

Checks if a date falls within a Daylight Saving Time period.

Signature

isDST(): boolean

Return Type

boolean - Returns true if the date is in Daylight Saving Time for the current timezone

Note

  • Detection is based on the system's timezone settings
  • Only accurate for timezones that observe DST

Example

playground.ts

Advice

It is advised not to rely on this method when an instance is created by timeZone method.

Last updated: Wed, Jun 24, 2026 09:04:13AM (UTC)

isEqualOrAfter

Checks if the current date is equal to or after a specified date.

isFirstDayOfMonth

Checks if the current date is the first day of the month.

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isDST()SignatureReturn TypeExample