"Sat, 03 Jan 1970 04:40:16"

Convert date and time to unixtime.

189616

Another datetime format string at UTC

YYYYMMDD
19700103

Only TIME
04:40:16

General datetime
1970-01-03 04:40:16Z

For Database
1970-01-03 04:40:16

For HTTP1.1
Sat, 03 Jan 1970 04:40:16 GMT

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