"Sun, 18 Jan 1970 20:35:41"

Convert date and time to unixtime.

1542941

Another datetime format string at UTC

YYYYMMDD
19700118

Only TIME
20:35:41

General datetime
1970-01-18 20:35:41Z

For Database
1970-01-18 20:35:41

For HTTP1.1
Sun, 18 Jan 1970 20:35:41 GMT

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