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Transgender awareness week
13 November – 19 December 2025
Disability history month
20 November – 20 December 2025
Decembeard
1 – 31 December 2025
Universal month for human rights
1 – 31 December 2025
Feast of saint Nicholas Christian
6 December 2025
Feast of the immaculate conception Catholic Christian
8 December 2025
Rohatsu (Bodhi day) Buddhist
8 December 2025
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Human rights day
10 December 2025
Feast of our lady of Guadalupe Catholic Christian
12 December 2025
Dhanu Sankranti ** Hindu
15 December 2025
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Hanukkah * Judaism
15 – 22 December 2025
Las Posadas starts Catholic Christian
16 December 2025
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International migrants’ day
18 December 2025
International human solidarity day
20 December 2025
Winter solstice
21 December 2025
Yule Wicca and Pagan
21 December 2025
Christmas eve Christian
24 December 2025
Noson Gyflaith (Toffee Evening)
24 December 2025
Christmas day Christian
25 December 2025
(Early Morning)Plygain
25 December 2025
Mari Lwyd (The Grey Mare)
25 December 2025 – 6 January 2026
Boxing day
26 December 2025
Feast of saint Stephen Christian
26 December 2025
Gŵyl San Steffan (St. Stephen's Day / Boxing Day)
26 December 2025
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Kwanzaa
26 December 2025 – 1 January 2026
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Zartosht no-diso Zoroastrian
26 December 2025
Feast of the holy family Catholic Christian
28 December 2025
Holy innocents’ day Christian
28 December 2025
New year’s eve
31 December 2025
Nos Galan (New Year's Eve)
31 December 2025
Watch night Christian
31 December 2025