Estimate a starting date by counting backward from a deadline under Korean Civil Act rules.
Use this when you know the final deadline but need to estimate the starting date or counting date.
You can combine years, months, weeks, and days in one entry. Example: 1 year 6 months 2 weeks.
Enter the dates and period
to see the result
All results are reference information based on general principles of the Korean Civil Act. Actual legal effect and deadline outcomes can vary depending on the facts, special agreements, and other applicable statutes. Consult a qualified professional before relying on the result for an important legal action.
It applies Korean Civil Act period-counting logic in reverse. The calculator works backward from the end date and keeps the day-one rule consistent with the option you selected.
If the deadline you entered is already the extended date, turn on the input end-date option. The calculator will first restore the original last day and then count backward from there.
Only as a reference. Procedural deadlines and limitation periods can follow special rules outside the general Korean Civil Act baseline, so important matters should be reviewed separately with a professional.
Use the end-date type option when your entered date is already the result of a weekend or Korean public-holiday extension. If you leave it off, the calculator treats the entered date as the original deadline.
This can help with reference scenarios such as counting backward from an election day notice period or a shareholders meeting notice deadline, but final legal analysis still depends on the governing rule.