"The" before a superlative adjective: why there is no definite article in "Your woodwork was worst of all"

I'd like to know, if you could tell me this :D
So, there's this sentence:

Your woodwork was worst of all.

And there's the other one:

The 4th of July was (the?) hottest day this summer.

I wonder why there is no "the" in the first one? And why in the second one there is?

English is not my native language, so can someone explain it to me in the most simple way? :D Thank you