The fourth month of the year (April, in the Gregorian calendar).
４月になると桜が満開になる地域が多い。
In April, many regions see cherry blossoms in full bloom.
新学期は通常４月に始まる。
The new school term usually starts in April.
しがつは気候も穏やかで過ごしやすい。
April has mild weather and is comfortable.
The fourth month of the lunar (traditional) calendar; its timing may differ from the modern calendar.
旧暦の四月に行われる祭りは季節行事として大切にされている。
Festivals held in the lunar fourth month are cherished as seasonal events.