Definition of 何時まで (いつまで)
いつ
                        何時まで
いつまで
itsumade
adverb
•
                
how long?, till when?(usually kana)
Other readings:
                いつまで《何時迄》
                Related Kanji
| 何 | what | 
| 時 | time, hour | 
| 迄 | until, up to, as far as, to the extent |