Hanggang kailan means until when in Tagalog, a phrase closely tied to waiting, longing and unanswered love in Filipino music. Short excerpts like this circulate on soundboards and social apps because the title alone frames an entire emotional story. Filipino listeners share it for homesickness, long distance relationships and missing family or partners, while wider audiences use the sad melody even without understanding every lyric. Its continued use comes from that universal feeling of holding on while time keeps passing.