This calculator helps you compute litigation deadlines under Ontario’s Rules of Civil Procedure by applying Rule 3.01 (how to count time) and Rule 1.03 (what counts as a holiday), including weekends and Ontario court holidays.

Use “after” when a rule gives you X days after an event, “before” when a rule requires action X days before an event, and “between” when you need to count the number of days between two dates. The calculator applies the correct counting rule for each option.

The calculator automatically adjusts for weekends and Ontario court holidays. For deadlines of 7 days or less, it excludes holidays from the count. For longer periods, it counts holidays, but then pushes the deadline forward if the final date falls on a holiday.

If you indicate that service occurred after 4:00 PM or on a holiday (for non-originating documents), the calculator automatically treats service as occurring on the next non-holiday, as required by Rule 3.01(1)(d).

When a “before” deadline lands on a holiday, the calculator shows: the rule-based date (next non-holiday), and a recommended earlier date (previous non-holiday) This helps you preserve the full notice period and avoid unintentionally shortening the required timeline.