"Thu, 08 Jan 1970 00:20:20"

Convert date and time to unixtime.

606020

Another datetime format string at UTC

YYYYMMDD
19700108

Only TIME
00:20:20

General datetime
1970-01-08 00:20:20Z

For Database
1970-01-08 00:20:20

For HTTP1.1
Thu, 08 Jan 1970 00:20:20 GMT

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