"Wed, 21 Jan 1970 21:48:55"

Convert date and time to unixtime.

1806535

Another datetime format string at UTC

YYYYMMDD
19700121

Only TIME
21:48:55

General datetime
1970-01-21 21:48:55Z

For Database
1970-01-21 21:48:55

For HTTP1.1
Wed, 21 Jan 1970 21:48:55 GMT

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