There are several potential causes for the getDay()
method to return an incorrect weekday:
Invalid input: If the input date is not a valid Date object or contains invalid values for day, month, or year, then getDay()
may not return the correct weekday.
Timezone issues: If the input date is in a different timezone than the system timezone or the browser timezone, getDay()
may return a different weekday than expected.
Date format: Depending on the format of the input date string, getDay()
may not correctly extract the day, month, or year values, resulting in an incorrect weekday.
Leap year issues: If the input date falls on a leap year, the getDay()
method may return an incorrect weekday since the number of days in February differs from a non-leap year.
Overlapping timezone: If the input date falls on a DST transition day where the local time overlaps with a different timezone, the getDay()
may return an incorrect weekday due to the ambiguity of the local time.
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Asked: 2021-08-28 11:00:00 +0000
Seen: 13 times
Last updated: Apr 19 '22