Timezone reference vs World Time Buddy
Both help you work across time zones but with different goals. World Time Buddy is an interactive meeting planner — pick cities, drag the time slider, share a link. tools.voiddo/timezone is a reference library — 25 pre-built city-pair conversions with live offsets, DST notes, and business overlap windows, ready to read without any setup.
tools.voiddo/timezone
- 25 pre-built city-pair conversions — the most common remote-work pairs
- Live UTC offset for both cities, updated in real time
- Business overlap highlighted: shows shared working hours at a glance
- DST notes for each pair — which city observes DST and when
- Instant lookup — no setup, no account, no dragging
- All major hubs covered: NY, SF, London, Tokyo, Sydney, Dubai, Mumbai, Singapore, Paris, Berlin, Toronto, Chicago, LA
- Free forever, browser-only, zero tracking
World Time Buddy
- Interactive meeting planner — pick up to 4 cities (more with premium)
- Drag-to-select time across a side-by-side hour grid
- Share a meeting link with attendees including their local time
- Calendar integration (Google, iCal) on paid plan
- Millions of monthly users — widely trusted for meeting scheduling
- Automatically adjusts for current DST
- Free for basic use; premium for calendar sync and unlimited cities
Feature comparison
| Feature | tools.voiddo/timezone | World Time Buddy |
|---|---|---|
| Pre-built city-pair reference | ✓ 25 pairs, instant access | — configure manually each visit |
| Live UTC offset | ✓ real-time for each city | ✓ real-time grid display |
| Business overlap highlighted | ✓ shared working hours noted per pair | ✓ visual grid shows overlapping hours |
| DST notes | ✓ explicit DST transitions per pair | ✓ automatically adjusts for current DST |
| Interactive time picker | — reference only | ✓ drag to select a time slot |
| Multi-city planning (3+ zones) | — city pairs only | ✓ up to 4 cities free, more with premium |
| Shareable meeting link | — | ✓ share a link showing local time for each attendee |
| Calendar integration | — | ✓ Google + iCal (paid plan) |
| No account needed | ✓ fully anonymous, zero tracking | ✓ basic mode works without account |
| Price | free forever | free (basic) / paid for premium features |
| Browser-only, no server | ✓ all computation local | — server-rendered |
| All IANA timezones covered | ✓ 25 most common pairs pre-built | ✓ all timezones searchable |
| Zero ads | ✓ | — ad-supported on free tier |
FAQ
What is the difference between tools.voiddo/timezone and World Time Buddy?
World Time Buddy is optimized for interactive meeting planning across multiple cities: drag to select a time, see everyone's local time in a side-by-side grid, and share a link. tools.voiddo/timezone is a reference library: 25 pre-built conversions for the most common remote-work city pairs, with live UTC offset, business overlap hours, and DST notes shown instantly without any setup. Both tools are useful — they serve different use cases.
Does tools.voiddo/timezone support planning meetings across 4 time zones?
No. tools.voiddo/timezone shows pre-built conversions for specific city pairs. For coordinating a meeting across 3 or 4 cities simultaneously, World Time Buddy's side-by-side grid and drag-to-select time picker are better suited. Use tools.voiddo/timezone for quick reference — "what's the offset between Tokyo and Berlin?" — not for multi-city scheduling sessions.
Does tools.voiddo/timezone handle Daylight Saving Time correctly?
Yes. Each city pair includes DST notes that flag which city observes daylight saving time and when transitions occur that would shift the overlap window. For example, a NY → London pair notes the 2-week period in spring when the US and UK clocks shift on different dates, narrowing the effective overlap. World Time Buddy auto-adjusts for current DST without showing the transition dates explicitly.
Do I need an account for either tool?
tools.voiddo/timezone requires no account and sends no data to any server — everything runs in your browser. World Time Buddy works in basic mode without an account, but calendar integration (Google Calendar, iCal) and additional city slots require a paid subscription.
Which city pairs does tools.voiddo/timezone cover?
The 25 pre-built pairs cover the most common remote-work combinations: New York to London, San Francisco to London, New York to Tokyo, San Francisco to Tokyo, London to Dubai, London to Mumbai, London to Singapore, London to Sydney, London to Berlin, London to Paris, New York to Paris, New York to Sydney, New York to Singapore, New York to Mumbai, New York to Berlin, New York to Chicago, New York to Toronto, New York to Los Angeles, San Francisco to New York, San Francisco to Paris, San Francisco to Bengaluru, London to Tokyo, Los Angeles to London, Tokyo to Singapore, and San Francisco to London. If your pair is not in the list, the tzdiff tool lets you compare any two IANA timezone strings.
When should I use World Time Buddy instead of tools.voiddo/timezone?
Use World Time Buddy when you are actively scheduling a meeting that involves 3 or more cities, you want to share a scheduling link with attendees showing their local time, or you need to integrate the result with a Google Calendar event. Use tools.voiddo/timezone when you want a quick reference for a specific city pair — current offset, business overlap, and DST notes — without configuring a planner or dealing with ads.
25 timezone conversions, instantly
Pre-built city-pair references for the most common remote-work pairs. Live UTC offset, business overlap hours, and DST notes — no setup, no account, no ads.
open timezone reference → compare any two zones →Competitor names and trademarks belong to their respective owners. This comparison reflects publicly observable tool behavior as of May 2026.