I had to work late tonite.
'tonite' is not the correct spelling of 'tonight', but it is often used in casual writing; also, 'lite' for 'light' and 'thru' for 'through'.
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog