YOU SAID:

i just fell up the stairs at 3am in the afternoon

INTO JAPANESE

ちょうど午後3時に階段から落ちた

BACK INTO ENGLISH

fell down the stairs just after 3pm

INTO JAPANESE

15時過ぎに階段から転げ落ちた

BACK INTO ENGLISH

I fell down the stairs after 15:00

INTO JAPANESE

15時過ぎに階段から転げ落ちました

BACK INTO ENGLISH

I fell down the stairs after 15:00