"Sun, 15 Feb 1970 18:27:22"

Convert date and time to unixtime.

3954442

Another datetime format string at UTC

YYYYMMDD
19700215

Only TIME
18:27:22

General datetime
1970-02-15 18:27:22Z

For Database
1970-02-15 18:27:22

For HTTP1.1
Sun, 15 Feb 1970 18:27:22 GMT

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