"Tue, 27 Jan 1970 19:40:39"

Convert date and time to unixtime.

2317239

Another datetime format string at UTC

YYYYMMDD
19700127

Only TIME
19:40:39

General datetime
1970-01-27 19:40:39Z

For Database
1970-01-27 19:40:39

For HTTP1.1
Tue, 27 Jan 1970 19:40:39 GMT


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