Recent experience: the 3 landings in 90 days rule

To act as PIC or co-pilot of an aircraft carrying passengers, FCL.060 requires at least 3 takeoffs, approaches and landings in the preceding 90 days as pilot flying, in an aircraft of the same type or class, or in a representative FSTD.

At night

To carry passengers at night, at least one of those three takeoffs and landings must have been at night, unless you hold an instrument rating.

What Geardown does

The dashboard counts your takeoffs and landings over the last 90 days from your logbook. It shows the date until which your experience stays valid if you stop flying, and warns you as soon as it lapses.

Commercial operators often apply their own requirements (ORO.FC). Always check your company operations manual.