Warning! you can cause issues setting time manually, its best to use the built in tools unless your Pi is part of an offline project.
To show the current date and time, using the currently configured timezone, from the command line use:
date
To show the current UTC time, from the command line use:
date -u
To manually configure the date and time, from a command line use:
sudo date -s "Thu Aug 9 21:31:26 UTC 2016"
To set your timezone, from the command line:
1. sudo raspi-config 2. Internationalization options 3. Change Time Zone 4. Select geographical area 5. Select city or region. 6. Reboot your pi.