In the UK, it is currently

Thursday the 21st of September, 2023 at 5:20pm UK time

That's:
September 21, 2023, 4:20 pm in Abidjan
September 22, 2023, 1:50 am in Adelaide
September 21, 2023, 6:20 pm in Amsterdam
September 22, 2023, 4:20 am in Auckland
September 21, 2023, 6:20 pm in Berlin
September 21, 2023, 1:20 pm in Bermuda
September 21, 2023, 11:20 am in Bogota
September 21, 2023, 6:20 pm in Bratislava
September 21, 2023, 1:20 pm in Brasilia
September 21, 2023, 1:20 pm in Buenos Aires
September 21, 2023, 12:20 pm in Caracas
September 21, 2023, 11:20 am in Chicago
September 21, 2023, 6:20 pm in Copenhagen
September 21, 2023, 10:20 am in Costa Rica
September 21, 2023, 8:20 pm in Dubai
September 21, 2023, 5:20 pm in Dublin
September 21, 2023, 10:20 am in Guatemala
September 21, 2023, 7:20 pm in Helsinki
September 21, 2023, 8:50 pm in Kabul
September 21, 2023, 7:20 pm in Kampala
September 21, 2023, 5:20 pm in Lisbon
September 21, 2023, 6:20 pm in Longyearbyen
September 21, 2023, 9:20 am in Los Angeles
September 21, 2023, 6:20 pm in Madrid
September 21, 2023, 12:20 pm in Manaus
September 22, 2023, 12:20 am in Manila
September 21, 2023, 7:20 pm in Mayotte
September 22, 2023, 2:20 am in Melbourne
September 21, 2023, 11:20 am in Mexico City
September 21, 2023, 12:20 pm in Montreal
September 21, 2023, 7:20 pm in Moscow
September 21, 2023, 7:20 pm in Nairobi
September 21, 2023, 12:20 pm in New York
September 21, 2023, 6:20 pm in Paris
September 22, 2023, 12:20 am in Perth
September 21, 2023, 6:20 pm in Podgorica
September 21, 2023, 7:20 pm in Qatar
September 22, 2023, 2:20 am in Queensland
September 21, 2023, 4:20 pm in Reykjavik
September 21, 2023, 7:20 pm in Riga
September 21, 2023, 6:20 pm in Rome
September 22, 2023, 4:20 am in the South Pole
September 21, 2023, 6:20 pm in Stockholm
September 21, 2023, 12:20 pm in Toronto
September 21, 2023, 9:20 am in Vancouver
September 22, 2023, 2:20 am in Victoria
September 21, 2023, 6:20 pm in Vienna
September 21, 2023, 6:20 pm in Warsaw
September 21, 2023, 6:20 pm in Zurich

These time zones are provided for your convenience, but are not guaranteed. You may want to double check the time wherever you happen to be