Blood Cancer awareness month
1 – 30 September 2025
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Urology awareness month.
1 – 30 September 2025
World Alzheimer’s month
1 – 30 September 2025
Ganesh Chaturthi Hindu
7 September 2025
Feast of the birth of the virgin Mary Christian
8 September 2025
Nativity of the Theotokos Orthodox Christian
8 September 2025
World Suicide prevention day
10 September 2025
Feast of the cross Christian
14 September 2025
Owain Glyndŵr Day
16 September 2025
Anant Chaturdashi ** Hindu
17 September 2025
International equal pay day
18 September 2025
Wales International Film Festival
18 – 19 September 2025
Abergavenny Food Festival
20 – 21 September 2025
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Feast of saint Matthew Christian
21 September 2025
World Alzheimer’s day
21 September 2025
Autumn equinox
22 September 2025
Mabon Wicca and Pagan
22 September 2025
Bi visibility day
23 September 2025
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International day of sign languages
23 September 2025
Porthcawl Elvis Festival
26 – 28 September 2025
Meskel Ethiopian Orthodox Christian
27 September 2025
Feast of saint Michael and all angels Christian
29 September 2025