The leap year status of the simulation is determined by the state of the checkbox ‘Treat simulation as leap year’. When checked, simulations that start before (or on) 28th February and end after (or on) 1st March will include 29th February. Users will also be able to nominate 29th February as the start or end date for the simulation. Results files generated from such simulations will then include 29th February.
Since .fwt files and .epw files are only 365 days long, for leap year simulations, Apache uses weather data from 30th December to fill in the missing data for 31st December.
