In the calculation of time periods, those that are calculated by hours begin to run immediately, and those that are calculated by days, months or years do not include the first day; provided however, that the first day of a period of statute of limitations is included as one day irrespective of the hours of that day.
期間の計算については、時で計算するものは、即時からこれを起算し、日、月又は年で計算するものは、初日を算入しない。但し、時効期間の初日は、時間を論じないで一日としてこれを計算する。