Shabbat lasts for 25 hours, from 18 minutes before the sun dips below the horizon on Friday night to the time when 3 medium sized stars would theoretically be visible in the sky if it weren't cloudy or the city on Saturday night.
During that time (with some more caveats that extend this time), there are 39 categories of "work" that aren't permitted to be done. I don't actually know all 39. But they include things like:
My favorite prohibited work on Shabbat is winnowing. I have no idea what winnowing is, but I think it has to do with wheat. It's not really a part of my every day life!
As a practical matter, here are a number of things that ARE a part of day to day life that are prohibited on Shabbat:
- turning lights on and off
- using the computer
- using money
- washing dishes
- carrying things from one place to another (which includes pushing strollers)
- playing sports
- using the electronic keys that a lot of apartment buildings have
I hope this is a good explanation; if I'm leaving things out, please ask more questions!