歌曲《first of may》的歌名意思是什么？

大概表现一种淡淡的哀伤吧~~~~或者对真爱永恒的期待

附一个歌词翻译
不过翻得比较烂~~~

when i was small, christmas trees were tall.小时候，我觉得圣诞树很高
we used 2 love while others used 2 play.我们过去总是爱,其他人总是玩
don't ask me why,but time has passed us by.不要问我原因,时光已经流逝
some one else moved in from far away.有人从遥远的地方走了过来

(chorus)
now we are tall, christmas trees are small.现在我们长高了,就觉得圣诞树很矮
and u don't ask the time of day.你不问我白天的时间
but u i,our love will never die.但你和我之间的爱情永不会凋谢
but guess we'll cry come first of may.但我猜我们会在五一节哭泣

the apple tree that grew 4 u me.为了你和我种的苹果树
i watched the apples falling one by one.我看到苹果一个个掉了下来
and i recall the moment of them all.我回想起它们成长的时刻
the day i kissed ur cheek u were mine.和我吻你脸颊的那天,你是我的

我认为翻译成《阳光灿烂的日子》比较贴切（意译）。

First of May
五月一日

五月的第一天,五月一日.

日期的表达呗, 难道还有其它之说?
五月一日, 五月的第一天.

五一节