"Sat, 31 Jan 1970 21:42:11"

Convert date and time to unixtime.

2670131

Another datetime format string at UTC

YYYYMMDD
19700131

Only TIME
21:42:11

General datetime
1970-01-31 21:42:11Z

For Database
1970-01-31 21:42:11

For HTTP1.1
Sat, 31 Jan 1970 21:42:11 GMT

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