Modifiers matching holiday:

• biblical,
• religious,
• major,
• secular,
• beautiful,
• ecclesiastical,
• sporting,
• memorable,
• personal,
• catholic,
• special,
• civic,
• jewish,
• busy,
• individual,
• joyous,
• big,
• local,
• traditional,
• federal,
• christian,
• common,
• over,
• regional,
• american,
• official,
• annual,
• national,
• important,
• cultural,
• romantic,
• fixed,
• liturgical,
• desirable,
• strange,
• active,
• key,
• festive,
• seasonal,
• irregular,
• basic,
• civil,
• floral,
• historical,
• popular,

Simple categories matching irregular:

• array,
• space,
• surface,
• work,
• shape,
• display,
• part,
• substrate,
• form,
• occurrence,
• organ,
• polygon,
• wall,
• object,
• behavior,
• solid,
• feature,
• asterism,
• system,
• week,
• phenomenon,
• area,
• ground,
• hours,
• line,
• job,
• item,
• shelter,
• terrain,
• commodity,
• particle,
• component,
• soil,
• material,
• event,
• original,
• holiday,
• connection,
• expense,
• unit,
• obstruction,
• organization,
• activity,
• use,
• cell,
• motion,
• profile,
• odor,
• flower,
• period,
• place,
• edge,
• body,
• dust,
• condition,
• pattern,
• structure,
• border,
• light,
• program,
• curve,
• payment,
• set,
• boundary,
• interval,
• astigmatism,
• road,