Daylight Saving Time Calculator

Find DST start and end dates, clock-change direction, UTC offset changes, and whether a date is currently in daylight saving time.

Use this free browser-based DST calculator to check spring forward and fall back dates by timezone and year. It helps plan meetings, travel, payroll windows, cron jobs, and calendar reminders around one-hour clock changes.

100% Browser-Based•Local Processing
Calculator

DST Inputs

Search common IANA timezone names. Examples: New York, London, Sydney, Tokyo.

Result
DST status
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-
DST starts-
DST ends-
Standard offset-
Daylight offset-
StartEnd
Choose a timezone and year to calculate DST changes.
DST transition workspace showing timezone, year, reference date, DST start, DST end, and daylight saving status
The workspace keeps timezone search, year selection, reference date, and DST output in one compact view.
Spring forward and fall back daylight saving time clock-change explanation
Spring forward skips one local hour. Fall back repeats one local hour, which can affect schedules and logs.
World ClockTime Zone ConverterTime Zone DifferenceOffset FinderUTC to Local TimeLocal Time to UTCCurrent Date & TimeFlight Time Calculator

Privacy Focused

🔒 Local Processing. Your data never leaves your device.

Instant Results

🌐 Fully Client-Side. Runs instantly in your browser.

No Signup

⚡ No accounts. No hassle. Just open and use.

Browser Based

🚀 Works right in your browser. No installs, no downloads.

Overview

Check DST Dates Before Schedules Drift

Daylight saving time changes the local clock in regions that observe DST. In spring, clocks usually move forward by one hour. In fall, clocks usually move back by one hour. This can change meeting times, travel plans, logs, reminders, payroll windows, and scheduled automation.

This calculator uses browser timezone rules for common IANA-style timezone names. The IANA Time Zone Database is updated periodically because governments can change time-zone boundaries and daylight-saving rules. For United States DST rules, NIST notes that in 2026 DST runs from March 8 at 2:00 AM local time to November 1 at 2:00 AM local time. The U.S. Department of Transportation explains that federal law sets the national daylight saving schedule for observing states.

Comparison

Why DST Needs More Than a Simple UTC Offset

TaskDST CalculatorManual Offset Math
Find next clock changeScans timezone offset changes for the year.Requires knowing local DST rules.
Check if a date is in DSTCompares reference date offset against yearly offsets.Easy to get wrong near transition weeks.
Plan meetings across countriesShows if the selected timezone changes offset.Different regions change on different dates.
Schedule software jobsShows spring-forward skipped hour and fall-back repeated hour context.One-hour errors can appear in logs or cron jobs.
Guide

How to Use the DST Calculator

Search a timezone▾

Type a city, country, or IANA timezone name such as New York, London, Berlin, Sydney, Auckland, Phoenix, or Kolkata. Choose the closest representative timezone.

The year controls which DST transitions are scanned. The reference date tells you whether daylight saving time is active on that specific date.

The result shows DST start, DST end, standard offset, daylight offset, and whether clocks move forward or backward by one hour.

Support

Frequently Asked Questions

When does daylight saving time start in 2026 in the United States?▾

In most of the United States, daylight saving time starts on March 8, 2026 at 2:00 AM local time, when clocks move forward to 3:00 AM.

In most of the United States, daylight saving time ends on November 1, 2026 at 2:00 AM local time, when clocks move back to 1:00 AM.

Spring forward means clocks move ahead by one hour at the DST start transition. A local hour is skipped, so the day has one fewer clock hour.

Fall back means clocks move backward by one hour at the DST end transition. One local hour repeats, so the day has one extra clock hour.

Some places do not observe daylight saving time. If a timezone keeps the same UTC offset all year, the calculator reports no DST transition for that year.

Yes. Daylight saving rules can change when governments change laws. The browser uses timezone data based on IANA-style rules, which are periodically updated.

DST can change the UTC offset for a location while another location does not change on the same date. This affects meeting times, cron jobs, logs, payroll windows, and calendar reminders.

Yes. The calculation runs in your browser. Your timezone, year, and reference date are not uploaded to Randomly.online.

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