"Sun, 18 Jan 1970 23:38:51"

Convert date and time to unixtime.

1553931

Another datetime format string at UTC

YYYYMMDD
19700118

Only TIME
23:38:51

General datetime
1970-01-18 23:38:51Z

For Database
1970-01-18 23:38:51

For HTTP1.1
Sun, 18 Jan 1970 23:38:51 GMT

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