"Sun, 04 Jan 1970 18:03:20"

Convert date and time to unixtime.

324200

Another datetime format string at UTC

YYYYMMDD
19700104

Only TIME
18:03:20

General datetime
1970-01-04 18:03:20Z

For Database
1970-01-04 18:03:20

For HTTP1.1
Sun, 04 Jan 1970 18:03:20 GMT

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