YOU SAID:

I blinked and suddenly I had a Valentine

INTO JAPANESE

瞬きしたら突然バレンタインが来た

BACK INTO ENGLISH

I blinked and suddenly Valentine's Day arrived.

INTO JAPANESE

瞬きすると突然バレンタインデーがやってきました。

BACK INTO ENGLISH

I blinked and suddenly Valentine's Day was here.

INTO JAPANESE

瞬きすると、突然バレンタインデーがやって来ました。

BACK INTO ENGLISH

I blinked and suddenly Valentine's Day was here.