"Sun, 18 Jan 1970 21:48:53"

Convert date and time to unixtime.

1547333

Another datetime format string at UTC

YYYYMMDD
19700118

Only TIME
21:48:53

General datetime
1970-01-18 21:48:53Z

For Database
1970-01-18 21:48:53

For HTTP1.1
Sun, 18 Jan 1970 21:48:53 GMT

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