44th open format — replaces Holidays.dbc + HolidayDescriptions.dbc
+ HolidayNames.dbc plus the AzerothCore-style game_event SQL
tables. Defines time-gated world events: seasonal holidays
(Hallow's End / Brewfest / Winter Veil), weekly call-to-arms BG
bonuses, world-PvP windows (Wintergrasp), one-shot specials, and
recurring daily / weekly resets. Each holiday has a recurrence
rule (Annual / Monthly / WeeklyRecur / OneTime), a calendar
window (startMonth + startDay + durationHours), and optional
cross-refs to a feature creature, an intro quest, and a token /
item reward issued during the window.
Cross-references with prior formats — holidayQuestId points at
WQT.questId, bossCreatureId points at WCRT.creatureId,
itemRewardId points at WIT.itemId, and areaIdGate / mapIdGate
point at WMS.areaId / WMS.mapId.
CLI: --gen-holidays (3 seasonal starter), --gen-holidays-weekly
(3 weekly BG call-to-arms windows), --gen-holidays-special (3
world-PvP / lunar / children events), --info-whol, --validate-whol
with --json variants. Validator catches id=0/duplicates, kind /
recurrence out of range, durationHours=0, invalid month/day for
non-weekly recurrence, and calendar-only events (no quest +
boss + reward) as a warning.
