YOU SAID:
Today I peed my pants.
INTO JAPANESE
今日はズボンをはいた。
BACK INTO ENGLISH
I wore my pants today.
INTO JAPANESE
今日はズボンをはいていた。
BACK INTO ENGLISH
I was wearing pants today.
INTO JAPANESE
今日はズボンをはいていた。
BACK INTO ENGLISH
I was wearing pants today.
That didn't even make that much sense in English.