"Sat, 03 Jan 1970 07:47:00"

Convert date and time to unixtime.

200820

Another datetime format string at UTC

YYYYMMDD
19700103

Only TIME
07:47:00

General datetime
1970-01-03 07:47:00Z

For Database
1970-01-03 07:47:00

For HTTP1.1
Sat, 03 Jan 1970 07:47:00 GMT

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