Happy holidays? Seneca, Epistles 2.18.1-4

Seneca doesn't want to party too hard over the holidays. Keep something back. Don't use all the license others give you; it won't end well. 
 
 
December est mensis: cum maxime civitas sudat. Ius luxuriae publicae datum est; ingenti apparatu sonant omnia, tamquam quicquam inter Saturnalia intersit et dies rerum agendarum; adeo nihil interest ut videatur (‡) mihi errasse qui dixit olim mensem Decembrem fuisse, nunc annum. Si te hic haberem, libenter tecum conferrem quid existimares esse faciendum, utrum nihil ex cotidiana consuetudine movendum an, ne dissidere videremur cum publicis moribus, et hilarius cenandum et exuendam togam. Nam quod fieri nisi in tumultu et tristi tempore civitatis non solebat, voluptatis causa ac festorum dierum vestem mutavimus. Si te bene novi, arbitri partibus functus nec per omnia nos similes esse pilleatae turbae voluisses nec per omnia dissimiles; nisi forte his maxime diebus animo imperandum est, ut tunc voluptatibus solus abstineat cum in illas omnis turba procubuit; certissimum enim argumentum firmitatis suae capit, si ad blanda et in luxuriam trahentia nec it nec abducitur. Hoc multo fortius est, ebrio ac vomitante populo siccum ac sobrium esse, illud temperantius, non excerpere se nec insignire nec misceri omnibus et eadem sed non eodem modo facere; licet enim sine luxuria agere festum diem. 
 
 
It's now December, the month when cityfolk sweat most. License has been given to public luxury. Everywhere the air resounds with massive preparations, as if anything could matter in the interval that separates today's business from the Saturnalia (†). But it's all so tedious that I must find fault with the observation someone once made, that December used to be just a month, but has since become an entire year unto itself. If I had you here, I would gladly consult your judgment on what we must do: whether we should alter our normal routine, taking festive dinners and doffing our togas to avoid any appearance that we reject public morals, or not. As matters stand, holidays and pleasure have achieved what only happens otherwise in days of riot or public mourning, and we have changed our clothes. If I know you well, your judgment would be that we should not resemble the skull-capped mob (*) entirely, nor look utterly unlike them, either. But maybe it is necessary to rule the mind more in these days, so that it may stand on its own, aloof from the pleasures into which the entire people has fallen prostrate. Certainly the surest proof of the mind's strength appears when it resists the sweet things that draw us into luxury, refusing to go after them itself or to be led away after them by others. It shows great strength to remain dry and sober among folk so drunk that they begin to overflow, but an even greater sign of temperance is the ability to make no exception of oneself, neither to stand apart from celebration nor to become lost in it: to do what all are doing, but not in the same way. It is possible to celebrate a holiday without wicked luxury. 
 
 
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(‡) Some MSS read ut non videatur here, but I prefer those that omit the negative. If it is added, then Seneca's complaint shifts: “But it's all so tedious that I cannot find fault with the observation someone once made, that December used to be just a month, but has since become an entire year unto itself.”
 
(†) This Roman festival dedicated to the god Saturn began with a public sacrifice and banquet, after which people celebrated privately with gift-exchanges and parties. Slaves were allowed more than usual freedom by their masters, gambling and drinking to excess were normal, and games were played—including the game of choosing a king to provide orders for the revelers (cf. Tacitus, Annals 13.15). By Seneca's time, the festival had been extended to last from the 17th of December to the 23rd. 
 
(*) Roman revelers commonly wore skull-caps (pillei, pillea) as part of the 'holiday outfit' of the Saturnalia. These hats were worn in other contexts, too—notably by slaves undergoing the ritual of manumission, which set them free. As an emblem of the goddess Libertas, the cap signified freedom or license.