The Angular Calendar fails to function properly across various time zones during daylight saving time.

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This is a known issue with the Angular Calendar and is caused by the fact that daylight saving time is observed differently in different parts of the world. This can lead to discrepancies in the display of time and date depending on the user's time zone.

To address this issue, it is recommended to use a timezone library such as Moment.js or Luxon to handle time zone conversions and display. These libraries have built-in support for daylight saving time and can help ensure that the calendar functions correctly across all time zones.