Visit this page to find out the time
Alternatively you can synchronize your computer's clock with a time server using the NTP protocol. Consult your operating system documentation on how to do that. Normally, in every operating system based on Unix, you can try, as root:
You could put this line in a script that runs at login or you could schedule it to run using cron or at.
On Windows you can try:
net time /setsntp:europe.pool.ntp.org