noun
morning spider (good luck omen)
Refers to a spider seen in the morning, traditionally considered a sign of good luck. Often used in folk beliefs or casual conversation.
朝蜘蛛を見ると、今日はいいことがあるかもしれない。
If you see a morning spider, something good might happen today.
祖母は朝蜘蛛は殺してはいけないと言っていた。
My grandmother used to say you mustn't kill a morning spider.