計算機
日付の加算 / 減算
任意の日付に日数・週数・月数・年数を加算または減算 — 今日から90日後、6ヶ月前の日付を簡単に計算
1万人以上の開発者に利用されています
Quick presets
Result date
Saturday, May 2, 2026
2026-05-02
30 days after the start date
Day of week
Saturday
Day of year
122
Week number
19
Quarter
Q2
Use cases:
• What date is 90 days from today?
• What was the date 6 months ago?
• When is 2 weeks after a specific date?
• Project due date, contract expiry, countdown to event