Happy (Holidays|(Christ|X|Winter-een-)mas|(Ch|H)ann?ukk?ah|Kwa(nza|anz)a|New Year’s (Eve|Day)|(Boxing|Zamenhof) Day|Yule(tide)?|Winter(val|s Day|fair)|Festiv(us|al of the Bells)), reddit!
Happy (Holidays|(Christ|X|Winter-een-)mas|(Ch|H)ann?ukk?ah|Kwa(nza|anz)a|New Year’s (Eve|Day)|(Boxing|Zamenhof) Day|Yule(tide)?|Winter(val|s Day|fair)|Festiv(us|al of the Bells)), reddit!
[187 characters]
Happy Xmas, reddit! Happy Kwanzaa, reddit! Happy Kwaanza, reddit! Happy New Year’s Eve, reddit! Happy New Year’s Day, reddit! Happy Zamenhof Day, reddit! Happy Boxing Day, reddit! Happy Yuletide, reddit! Happy Yule, reddit! Happy Festival of the Bells, reddit! Happy Festivus, reddit! Happy Winter-een-mas, reddit! Happy Winters Day, reddit! Happy Winterval, reddit! Happy Winterfair, reddit! Happy Christmas, reddit! Happy Chanukah, reddit! Happy Chanukkah, reddit! Happy Channukah, reddit! Happy Channukkah, reddit! Happy Holidays, reddit! Happy Hanukah, reddit! Happy Hanukkah, reddit! Happy Hannukah, reddit! Happy Hannukkah, reddit!
[613 characters, not counting spaces]
328% compression
Happy (Holidays|(Christ|X|Winter-een-)mas|(Ch|H)ann?ukk?ah|Kwa(nza|anz)a|New Year’s (Eve|Day)|(Boxing|Zamenhof) Day|Yule(tide)?|Winter(val|s Day|fair)|Festiv(us|al of the Bells)), reddit!
[187 characters]
Happy Xmas, reddit! Happy Kwanzaa, reddit! Happy Kwaanza, reddit! Happy New Year’s Eve, reddit! Happy New Year’s Day, reddit! Happy Zamenhof Day, reddit! Happy Boxing Day, reddit! Happy Yuletide, reddit! Happy Yule, reddit! Happy Festival of the Bells, reddit! Happy Festivus, reddit! Happy Winter-een-mas, reddit! Happy Winters Day, reddit! Happy Winterval, reddit! Happy Winterfair, reddit! Happy Christmas, reddit! Happy Chanukah, reddit! Happy Chanukkah, reddit! Happy Channukah, reddit! Happy Channukkah, reddit! Happy Holidays, reddit! Happy Hanukah, reddit! Happy Hanukkah, reddit! Happy Hannukah, reddit! Happy Hannukkah, reddit!
[613 characters, not counting spaces]
328% compression