1 PM; thirteen o'clock
Used in 24-hour time notation; common in schedules, timetables, and formal contexts.
The meeting starts at 1 PM.
Please take the 1 PM train.
Standard modern numeral-kanji spelling for 1 PM.
Full kanji spelling; less common than the numeral form but still used in formal or vertical writing.
Compound of 十三 (thirteen) + 時 (hour), following the standard pattern for 24-hour time expressions.