"Sun, 29 Mar 1970 07:12:30"

Convert date and time to unixtime.

7542750

Another datetime format string at UTC

YYYYMMDD
19700329

Only TIME
07:12:30

General datetime
1970-03-29 07:12:30Z

For Database
1970-03-29 07:12:30

For HTTP1.1
Sun, 29 Mar 1970 07:12:30 GMT

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