"Tue, 21 Apr 1970 07:12:35"

Convert date and time to unixtime.

9529955

Another datetime format string at UTC

YYYYMMDD
19700421

Only TIME
07:12:35

General datetime
1970-04-21 07:12:35Z

For Database
1970-04-21 07:12:35

For HTTP1.1
Tue, 21 Apr 1970 07:12:35 GMT

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