"Tue, 19 May 1970 07:11:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700519
Only TIME
07:11:22
General datetime
1970-05-19 07:11:22Z
For Database
1970-05-19 07:11:22
For HTTP1.1
Tue, 19 May 1970 07:11:22 GMT