I was going to Pakistan for short term vacations...

If you have an entry or visa / visa issued from Abu Dhabi, Sharjah, Ajman, Umm Al Quwain, Ras Al Khaimah or Fujairah, you can check its validity, date of issue and completion through  the e-Channel Smart Channels , Of the Federal Authority for Identity and Nationality. 
If you have an entry or visa  issued from Dubai, you can inquire about the validity of the visa and the date of its 
issuance and termination through the website of theGeneral Directorate of Residency and Foreigners Affairs in Duba