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Direct answer
The UseCOS Days Between Dates Calculator computes exact astronomical durations, calendar day intervals, and working business days (excluding weekends) according to the ISO 8601 Gregorian calendar standard, including leap-year calculations.
Calculate the exact number of calendar days, business working days, weeks, and months between any two dates, or add/subtract days to find future dates.
Equal to 21 weeks and 5 days (4 months).
Procedural timeline standards (2026) for real estate conditions, tenant notices, court filings, and cooling-off periods.
| Procedure / Contract Event | Duration Type | Statutory Requirement | Day 1 & Rollover Rules | Critical Execution Strategy |
|---|---|---|---|---|
| Ontario LTB N12 Notice (Own-Use) | 60 Calendar Days | Must end on last day of rental period | Day notice given is excluded | Notice must be given at least 60 full days before the last day of the rental period (e.g. month-end). |
| Ontario LTB N4 Notice (Rent Arrears) | 14 Calendar Days | Earliest termination is day 15 | Add 5 days if served by regular mail | Day notice served is day 0. Tenant has until end of 14th day to pay arrears before landlord can file L1 on day 15. |
| Real Estate Purchase Condition | 5 Business Working Days | Financing & home inspection window | Excludes Saturdays, Sundays & statutory holidays | Notice of fulfillment or waiver must be delivered before 11:59 PM on the 5th business banking day. |
| Pre-Construction Condo Cooling-Off | 10 Calendar Days | Ontario Condominium Act s. 73 | Starts after receipt of Disclosure Statement | Buyer has unconditional statutory right to rescind agreement without penalty within 10 calendar days. |
| Small Claims / Court Defence | 20 Calendar Days | Filing Statement of Defence | If day 20 is weekend/holiday, rolls to next court day | Failure to file within 20 days allows plaintiff to note defendant in default and obtain default judgment. |
Business-day counts exclude Saturdays and Sundays only -- they do not exclude statutory or public holidays, which vary by country, province, state, and even collective agreement. If you're computing a legal notice period or filing deadline, subtract any holidays that fall in the range yourself, or confirm the count with the relevant court, tribunal, or labour standards office.
Calculations and media conversions execute locally inside client memory. No files, personal figures, or data records ever transit through external cloud servers.
Complies with ISO 8601 Calendar & Date Representation Specifications.
Authored by UseCOS Research & Engineering.