奧運會什麼時候不是每四年舉行一次

奧運會通常每四年舉行一次，但也有以下幾次因特殊原因而延期舉行：

1. 第一次世界大戰（1916 年柏林奧運會）：由於戰爭，取消舉辦。

2. 第二次世界大戰（1940 年東京奧運會和 1944 年倫敦奧運會）：由於戰爭，取消舉辦。

3. 蘇聯入侵阿富汗（1980 年莫斯科奧運會）：美國等西方國家抵制，導致部分國家未參賽。

因此，奧運會並非總是每四年舉行一次，在特殊情況下會延期或取消舉辦。

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