While in English we add a word in front of the days of the week, in French we don't do the same:
on Monday = le lundi (not sur / au / etc)
last Monday = le lundi passé
next Tuesday = le mardi prochain
in the weekend = le weekend
during the weekend = pendant le weekend
last weekend = le weekend passé
See if your sentence (as we don't have it all, and in French context is King), works "Normalement, pendant le weekend..."
Hope this helps!
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