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un-Christmassy
un-Christmassy adj. 
/(ˌ)ʌŋˈkrɪsməsi/,
Brit. /(ˌ)ʌnˈkrɪsməsi/
, /(ˌ)ʌnˈkrɪsməsi//(ˌ)ʌŋˈkrɪsməsi/U.S. /ˌənˈkrɪsməsi/
/ˌənˈkrɪsməsi/ΚΠ
1860 Critic 29 Dec. 819/1 Christmas week is not one in which un-Christmassy books are to be expected.
1927 D. H. Lawrence Let. 12 Dec. (1962) II. 1026 The post is so tiresome here, and altogether one feels so unchristmassy.
2017 S. Kinsella My not so Perfect Life viii. 115 The DJ is firmly un-Christmassy—Slade hasn't been played once.
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