"Fri, 02 Jan 1970 12:25:20"

Convert date and time to unixtime.

131120

Another datetime format string at UTC

YYYYMMDD
19700102

Only TIME
12:25:20

General datetime
1970-01-02 12:25:20Z

For Database
1970-01-02 12:25:20

For HTTP1.1
Fri, 02 Jan 1970 12:25:20 GMT

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