This is the 82nd most frequent French word.
mardi
Tuesday
The word 'mardi' is used here as a day of the week, indicating a repeated action occurring every Tuesday.
Je vais au marché le mardi.
I go to the market on Tuesdays.
Here, 'mardi' is indicating the current day of the week, specifying that today is Tuesday.
Nous sommes mardi aujourd'hui.
It's Tuesday today.
In this sentence, 'mardi' specifies a particular upcoming day, referring to the next Tuesday.