"Thu, 29 Jan 1970 21:45:42"

Convert date and time to unixtime.

2497542

Another datetime format string at UTC

YYYYMMDD
19700129

Only TIME
21:45:42

General datetime
1970-01-29 21:45:42Z

For Database
1970-01-29 21:45:42

For HTTP1.1
Thu, 29 Jan 1970 21:45:42 GMT

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