'Europe/London' != 'UTC'
Because of the UK had between 1969-1971 GMT+1 leads the use of London timezone to an additional hour inbetween UNIX timestamp.
'Europe/London' = BST (British Standard Time)
'UTC' = GMT
유럽
| Europe/Amsterdam | Europe/Andorra | Europe/Astrakhan | Europe/Athens |
| Europe/Belgrade | Europe/Berlin | Europe/Bratislava | Europe/Brussels |
| Europe/Bucharest | Europe/Budapest | Europe/Busingen | Europe/Chisinau |
| Europe/Copenhagen | Europe/Dublin | Europe/Gibraltar | Europe/Guernsey |
| Europe/Helsinki | Europe/Isle_of_Man | Europe/Istanbul | Europe/Jersey |
| Europe/Kaliningrad | Europe/Kiev | Europe/Kirov | Europe/Lisbon |
| Europe/Ljubljana | Europe/London | Europe/Luxembourg | Europe/Madrid |
| Europe/Malta | Europe/Mariehamn | Europe/Minsk | Europe/Monaco |
| Europe/Moscow | Europe/Oslo | Europe/Paris | Europe/Podgorica |
| Europe/Prague | Europe/Riga | Europe/Rome | Europe/Samara |
| Europe/San_Marino | Europe/Sarajevo | Europe/Simferopol | Europe/Skopje |
| Europe/Sofia | Europe/Stockholm | Europe/Tallinn | Europe/Tirane |
| Europe/Ulyanovsk | Europe/Uzhgorod | Europe/Vaduz | Europe/Vatican |
| Europe/Vienna | Europe/Vilnius | Europe/Volgograd | Europe/Warsaw |
| Europe/Zagreb | Europe/Zaporozhye | Europe/Zurich |
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