"Sat, 10 Jan 1970 01:21:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
01:21:27
General datetime
1970-01-10 01:21:27Z
For Database
1970-01-10 01:21:27
For HTTP1.1
Sat, 10 Jan 1970 01:21:27 GMT