About Date Range Generator

List every date between start and end — step N days/weeks/months. Part of the DevTools Surf developer suite. Browse more tools in the Date / Time collection.

Use Cases

• Data analysts generating date series for time-series charts
• Backend devs creating test fixtures with sequential timestamps
• Finance teams listing business days between reporting periods
• Scheduler builders populating calendar slots across date spans

Tips

• Set step to 7 days for weekly date sequences
• Use month steps for fiscal quarter boundary calculations
• Copy the date list directly into spreadsheet or test data

Fun Facts

• The Gregorian calendar, adopted in 1582 by Pope Gregory XIII, corrected the Julian calendar's drift by skipping 10 days — October 4 was directly followed by October 15.
• Calculating date ranges across months is surprisingly complex because months have 28, 29, 30, or 31 days — no simple arithmetic formula works for all cases.
• The JavaScript Temporal API, reaching Stage 3 in TC39 in 2023, was designed specifically to fix the pain of date range calculations that Date/Moment.js handle poorly.

FAQ

What's the output format?

List of dates, one per line. Each in ISO format. Copy into spreadsheets, calendars, or code.

Step sizes?

Every N days, weeks, months, or years. Useful for generating monthly billing dates or weekly standup dates.

What about weekends?

Toggle 'skip weekends' for business-day ranges. Useful for scheduling workday tasks.

Multiple ranges?

Separate tools — run twice and concatenate. Or use a spreadsheet that handles arbitrary date series.