"Sat, 10 Jan 1970 00:40:22"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700110
Only TIME
00:40:22
General datetime
1970-01-10 00:40:22Z
For Database
1970-01-10 00:40:22
For HTTP1.1
Sat, 10 Jan 1970 00:40:22 GMT