Missing timezone
A date without timezone may be interpreted as browser local time.
日付を Unix タイムスタンプに変換
読みやすい日時を API、ログ、DB 向けの Unix 秒・ミリ秒に変換します。
解決できること
日付文字列、ISO 値、ローカル時刻から数値 timestamp が必要なときに使います。
使い方
- Prepare a clear date-time string such as an ISO value or YYYY-MM-DD HH:mm:ss.
- Open the main timestamp tool and paste it into the DateTime to Timestamp panel.
- Choose the timezone context before trusting the output.
- Copy seconds or milliseconds depending on the target system.
Date input example
2026-01-01 00:00:00 2026-01-01T00:00:00Z
The tool returns Unix seconds and Unix milliseconds for the same date-time input.
Use UTC input when the target API expects a timezone-independent value.
よくあるミス
Ambiguous date format
Prefer ISO or YYYY-MM-DD HH:mm:ss to avoid month/day confusion.
Wrong output unit
Check whether your API expects seconds or milliseconds before copying.
日付から timestamp FAQ
Can I use ISO date strings?
Yes. ISO strings are recommended when timezone clarity matters.
Should I copy seconds or milliseconds?
Use seconds for many backend APIs and milliseconds for JavaScript Date workflows.
Why did the result shift by timezone?
The same date text may be parsed in local time unless a UTC offset is included.