仕組みと動作原理
DATE関数はExcel業務を効率化する代表的な関数です。Creates a valid date serial number from separate Year, Month, and Day. 複雑な集計や参照処理を簡素化し、データ分析の精度と生産性を飛躍的に高めます。
構文.
標準Excel表記法=DATE(year, month, day)引数一覧.
この関数で指定できるすべての引数について詳しく解説します。
Four digit year number (e.g. 2025).
指定例:2025Integer from 1 to 12 representing month.
指定例:5Integer from 1 to 31 representing day.
指定例:20具体的な計算例
ステップ別の実務シナリオConstruct Date from Columns
Combine separate Year, Month, and Day columns into a single date.
| Year | Month | Day | Constructed Date |
|---|---|---|---|
| 2025 | 5 | 20 | — |
| 2025 | 12 | 31 | — |
=DATE(A2, B2, C2)Evaluates DATE over the sample table cells, placing the verified output in cell D2.
数式ジェネレーター
ウィザードを開く引数を入力するだけで、シートにそのまま貼り付けて使える数式を作成できます。
=DATE()出力される値の特性
Returns "2025-05-20" based on sample evaluation criteria and active cell references.
実務上のベストプラクティス
- Always use 4-digit years to avoid confusion with 1900-era serial dates.
よくあるミスと注意点
- Supplying month numbers greater than 12 rolls into subsequent years (e.g. Month 13 becomes January of next year).
各プラットフォーム対応表
実際のExcelおよびGoogleスプレッドシートの計算エンジン仕様に基づいた検証結果です。
Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.
100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.
よくある質問と回答
技術解説Can I use DATE across different worksheets in Excel?↓
Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =DATE(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.
What is the most common reason for errors in DATE?↓
Supplying month numbers greater than 12 rolls into subsequent years (e.g. Month 13 becomes January of next year).
Does DATE work identically in Google Sheets?↓
Yes, DATE is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.