"Sat, 31 Jan 1970 15:08:09"

Convert date and time to unixtime.

2646489

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
15:08:09

General datetime
1970-01-31 15:08:09Z

For Database
1970-01-31 15:08:09

For HTTP1.1
Sat, 31 Jan 1970 15:08:09 GMT

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