modular_aphelion/modules/species_page/code/species_page.dm

/proc/get_holiday_races	Species that are roundstart races only during a holiday, as an assoc list of id to holiday.
/proc/generate_holiday_races	Every species with a holiday of its own that the roundstart races config doesn't already allow: id -> holiday.
/proc/get_species_page_ids	Every species the species page offers, as an assoc list of id to TRUE.