4月是公历年中个第四个月，是小月，共有30天。
英文中个4月（April）來源於單詞aperire，表示「開」，可能意味著植物拉春天開始生長。
- 拉交关多國家是愚人節（天主教國家个愚人節拉12月28号）。
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