Meanings
colloquial · idiomatic · prospectivein the coming days, in a few days
Ich hab die Tage wenig Zeit.I don't have much time in the coming days.
colloquial · idiomaticin the past days, a few days ago
Ich hatte die Tage wenig Zeit.I didn't have much time in the past days.
colloquial · idiomaticUsed other than figuratively or idiomatically: see die, Tage.
Im Frühling werden die Tage länger.The days get longer in spring.