EPC Date Calculator (Months + EPO Closing Days)
Enter a base date (DD-MM-YYYY) and months to add (0–31). The calculator:
(1) adds months using “same day number / else last day of month”, then
(2) rolls forward if the date falls on a weekend or assumed EPO closing day.
Allowed years: 2020–2030 (inclusive).
Max: 31 months.
Rule 134(1) EPC extends to the next day when all filing offices are open.
Default uses the union to be conservative.
Shows “month-added” date before weekend/holiday roll-forward.