"Sun, 29 Mar 1970 00:52:51"

Convert date and time to unixtime.

7519971

Another datetime format string at UTC

YYYYMMDD
19700329

Only TIME
00:52:51

General datetime
1970-03-29 00:52:51Z

For Database
1970-03-29 00:52:51

For HTTP1.1
Sun, 29 Mar 1970 00:52:51 GMT

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