"Thu, 01 Jan 1970 21:45:00"

Convert date and time to unixtime.

78300

Another datetime format string at UTC

YYYYMMDD
19700101

Only TIME
21:45:00

General datetime
1970-01-01 21:45:00Z

For Database
1970-01-01 21:45:00

For HTTP1.1
Thu, 01 Jan 1970 21:45:00 GMT

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