nibcat.com

Timezone Converter

All overlap:
🌐UTC01:25UTC+0 (-9h)
🇯🇵Local (Tokyo)10:25UTC+9
🇺🇸New York (ET)21:25-1dUTC-4 (-13h)DST
🇬🇧London (GMT/BST)02:25UTC+1 (-8h)DST

Timeline

0006121823
🌐UTC
🇯🇵Local
🇺🇸New
🇬🇧London

Work hours (9–18)

24-Hour Conversion Table

UTC🇯🇵 Local🇺🇸 New🇬🇧 London
00:0009:0020:00-101:00
01:0010:0021:00-102:00
02:0011:0022:00-103:00
03:0012:0023:00-104:00
04:0013:0000:0005:00
05:0014:0001:0006:00
06:0015:0002:0007:00
07:0016:0003:0008:00
08:0017:0004:0009:00
09:0018:0005:0010:00
10:0019:0006:0011:00
11:0020:0007:0012:00
12:0021:0008:0013:00
13:0022:0009:0014:00
14:0023:0010:0015:00
15:0000:00+111:0016:00
16:0001:00+112:0017:00
17:0002:00+113:0018:00
18:0003:00+114:0019:00
19:0004:00+115:0020:00
20:0005:00+116:0021:00
21:0006:00+117:0022:00
22:0007:00+118:0023:00
23:0008:00+119:0000:00+1

■ Work hours (9–18) · +1/-1 = next day/prev day · Row highlight = All overlap

Timezone Converter

Use this tool to compare one date and time across multiple time zones. The converter always includes UTC and your browser’s local time zone, and you can add time zones from the available list or use preset groups.

The page also includes a timeline and a 24-hour conversion table with work-hour highlighting.

Common Use Cases

Scheduling Across Regions

Compare local time with another region before choosing a meeting time.

Reading UTC Times

Convert a UTC time into your local time and other commonly used regions.

Finding Work-Hour Overlap

Use the highlighted 9-18 work-hour blocks and table rows to spot rough overlap windows.

How to Use

  1. Choose a date and time, or use Now.
  2. Select the source zone in From TZ.
  3. Use a preset or Add timezone to add more zones.
  4. Review the converted rows, timeline, and 24-hour conversion table.
  5. Remove extra zones with the remove button when you no longer need them.

Notes / Limitations

Time zone conversion uses the browser’s Intl time zone data. Results depend on the time zone data available in the user’s browser runtime.

  • Added time zones come from the predefined popular time zone list in the UI.
  • Work hours are fixed to 9:00-18:00 and are not configurable.
  • DST badges and offsets are calculated for the selected date.
  • Ambiguous or skipped local times around daylight saving transitions are resolved by the browser date/time behavior.

Privacy & Processing

Time zone calculations run in the browser with JavaScript and Intl APIs. The timezone converter code does not send the selected date, time, or zones to a server.

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