Is Truncate() Really the Best Way to Get the Local Beginning of Day?-Golang-php.cn

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Is Truncate() Really the Best Way to Get the Local Beginning of Day?

Linda Hamilton

Nov 21, 2024 pm 12:57 PM

Is Truncate() Really the Best Way to Get the Local Beginning of Day?

Getting the Beginning of the Local Day

The question pertains to finding the beginning of the current day in the local timezone, commonly known as "beginning of day" (BOD). The problem arises when considering that timezones may have shorter or longer days due to daylight saving time (DST) adjustments.

The code provided in the question, Bod(), correctly calculates the BOD by extracting the year, month, and day components and reconstructing a new time object. This method accurately reflects the local time without the need for specialized time-zone manipulation.

However, the accepted answer, Truncate(), claims to be a better solution but exhibits several drawbacks. Firstly, it does not provide the local BOD as it truncates UTC time, resulting in a time offset from the desired local time.

Secondly, Truncate() assumes a 24-hour day, which is not always accurate. In areas with DST, days can be shorter or longer than 24 hours. Therefore, Bod() is a more reliable and universally applicable solution for obtaining the local BOD.

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