What is "temporal case"

n. (context grammar English): noun case used to specify a time. In English, this is usually expressed by the preposition "at," as in "'''at''' six o’clock," "'''at''' midnight," "'''at''' Christmas." Hungarian is a language that uses the temporal case.

The temporal case ( abbreviated ) in morphology is used to indicate a time.

In the Hungarian language its suffix is -kor. For example: hétkor "at seven" or hét órakor "at seven o'clock", éjfélkor "at midnight", karácsonykor "at Christmas". This is one of the few suffixes in Hungarian to which rules of vowel harmony do not apply.

In Finnish its suffix is -lloin / -llöin. For example: milloin - when?; jolloin - when (relative pronoun); tällöin - at this time; silloin - then; tuolloin - at that time.