"Sun, 18 Jan 1970 02:46:37"

Convert date and time to unixtime.

1478797

Another datetime format string at UTC

YYYYMMDD
19700118

Only TIME
02:46:37

General datetime
1970-01-18 02:46:37Z

For Database
1970-01-18 02:46:37

For HTTP1.1
Sun, 18 Jan 1970 02:46:37 GMT

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