"Sat, 03 Jan 1970 07:47:43"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700103
Only TIME
07:47:43
General datetime
1970-01-03 07:47:43Z
For Database
1970-01-03 07:47:43
For HTTP1.1
Sat, 03 Jan 1970 07:47:43 GMT