Computation of statutory time from detention excludes the first day, making the preventive detention confirmation timely.

Where a statute requires confirmation of a preventive detention order within three months from the date of detention, the date of detention is excluded in computing time and the last day is included. Applying that rule, the confirmation order was made within the prescribed period, so the detention was validly confirmed and the objection that it was time-barred was rejected.

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Issues: Whether, in computing the period of three months from the date of detention for confirmation of a preventive detention order, the date of detention is to be excluded or included.

Analysis: The period prescribed by law for doing an act is ordinarily computed by excluding the first day and including the last day. The distinction between a period within which an act may be done and a time limit for doing an act supports that construction. Applying that rule to the statutory period of three months from the date of detention, the date of detention had to be left out of account. On that computation, the confirmation order was made within time.

Conclusion: The detention was validly confirmed within the prescribed period, and the contention that the confirmation was time-barred was rejected.

Ratio Decidendi: Where a statute prescribes a period running from a specified date for doing an act, the first day is excluded and the last day is included in computing the period.

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