"Sun, 18 Jan 1970 12:31:29"

Convert date and time to unixtime.

1513889

Another datetime format string at UTC

YYYYMMDD
19700118

Only TIME
12:31:29

General datetime
1970-01-18 12:31:29Z

For Database
1970-01-18 12:31:29

For HTTP1.1
Sun, 18 Jan 1970 12:31:29 GMT

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