Civil Code

The method of computation of a period of time is governed by the provisions of this Chapter unless otherwise provided in the laws and regulations or a judicial order, or unless otherwise provided for by the relevant juridical act.

When a period is provided for in hours, the period commences immediately at the specified time.

When a period is provided for in days, weeks, months, or years, the first day of the period is not included in the computation; provided, however, that this does not apply when the period commences at twelve midnight.

In the case referred to in the preceding Article, the period expires at the end of the last day.

If the last day of a period falls on a Sunday, a holiday as provided in the Act on National Holidays (Act No. 178 of 1948), or any other holiday, only when it is customary not to do business on the relevant day, the period expires on the immediately following day.

If a period is provided for in weeks, months, or years, the period is calculated in accordance to the calendar.

If a period does not commence at the beginning of the week, month, or year, that period expires on the day immediately preceding the day which corresponds to the commencement day in the last week, month or year; provided, however, that if the period is provided for in months or years and the last month does not contain a corresponding day, the period expires on the last day of that month.