"Sat, 03 Jan 1970 03:42:03"

Convert date and time to unixtime.

186123

Another datetime format string at UTC

YYYYMMDD
19700103

Only TIME
03:42:03

General datetime
1970-01-03 03:42:03Z

For Database
1970-01-03 03:42:03

For HTTP1.1
Sat, 03 Jan 1970 03:42:03 GMT

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