Building a Cleaner Time Zone Converter for Remote Work

Rex Sunny — Sat, 04 Jul 2026 08:56:41 +0000

Time zone conversion looks like a simple problem until you start dealing with real users, remote meetings, daylight saving changes, and people in different parts of the world.

I recently worked on a small utility project: a cleaner time zone converter for quickly comparing times between different cities and regions.

This was not meant to be a huge app. It was more of a practical tool built around one repeated frustration: many existing time zone tools work, but they often feel outdated, cluttered, or slower than they need to be.

Why I Built It

I often need to compare times between places like Singapore, London, New York, and other regions. The usual workflow is simple:

Pick a time
Choose a few locations
Check what time it is elsewhere
Make sure the date did not shift
Avoid scheduling something at a terrible hour for someone else

The problem is that a lot of older tools make this feel heavier than necessary.
For a utility tool, the ideal experience should be fast and obvious. Open it, compare the time, get the answer, move on.

UX Goals

The main goal was to reduce friction.
Some things I focused on:

Simple layout
Clear converted results
Fast interaction
Mobile-friendly design
Avoiding unnecessary visual noise
Making the tool useful without requiring instructions

Small tools benefit a lot from good UX. If a user needs to think too much, the interface is probably doing too much.

Technical Things That Matter

Time zones are trickier than they look.
It is tempting to think of them as simple offsets like UTC+8 or UTC-5, but that breaks down quickly once daylight saving time enters the picture.
A better approach is to work with real IANA time zone identifiers, such as:

Asia/Singapore Europe/London America/New_York

This helps avoid relying too much on ambiguous abbreviations like

CST, which can mean different things in different contexts.
Other details that matter:
Handling date rollovers when converting across regions
Formatting output clearly
Avoiding confusing timezone abbreviations
Keeping the UI responsive
Making sure browser locale behavior does not create unexpected results
Keeping the bundle lightweight for a simple tool

Possible Future Improvements

Some ideas I may add later:

Shareable meeting time links
More city presets
Better support for teams
Calendar export
Favorite time zones
Working-hours overlap view

But I want to keep the tool lightweight. Every new feature has to earn its place.

Final Thoughts

This was a good reminder that utility apps do not need to be complicated to be valuable. Sometimes the best product is just a common task made slightly easier.

And with time zones, even “slightly easier” can save a lot of confusion.

Cheers!

DEV Community: Rex Sunny

Building a Cleaner Time Zone Converter for Remote Work