"Sat, 03 Jan 1970 05:48:20"

Convert date and time to unixtime.

193700

Another datetime format string at UTC

YYYYMMDD
19700103

Only TIME
05:48:20

General datetime
1970-01-03 05:48:20Z

For Database
1970-01-03 05:48:20

For HTTP1.1
Sat, 03 Jan 1970 05:48:20 GMT

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