How does it handle different time zones and daylight saving time?

We use IANA time zones and automatically account for DST and odd offsets (e.g., +05:30/+05:45) to align all attendees accurately.

What is a Must attendee vs Optional attendee?

Must attendees must be covered by a candidate time slot. Optional attendees are marked as covered when possible, but not required.

Do you store my attendees' data on a server?

The current prototype is local-first, using your browser's localStorage. No server-side storage is performed for attendee data.

Can I visualize the best candidate times?

Yes. We render a per-date 24h timeline with Best and Available labels, along with a Top N list for quick selection.

Intelligent cross-timezone scheduling

Meeting Time Zone Planner

More than a converter—add participants and work hours, then see Best/Available overlaps on a single 24h timeline. Must/Optional prioritization with automatic IANA/DST handling.

24h Timeline Preview

Darker blocks represent Best windows covering Must attendees; lighter blocks show Available overlaps across optional members.

Must attendees: Shanghai, New York, Berlin

Optional attendees: Sydney, Vancouver

Duration: 60 minutes · Base timezone: Asia/Shanghai

Problems & solutions

The realities of timezone coordination

From “time difference between New York and London” to “PST to mountain time zone”, we bundle the messy parts into one visual flow.

Problem 1

Across time zones with DST and odd offsets (e.g., +05:30/+05:45), overlaps are hard to see.

Solution: A single 24h timeline with automatic IANA/DST conversion that highlights Best/Available overlapping slots.

Problem 2

Different commitment levels (Must vs Optional) slow decisions.

Solution: Must/Optional prioritization—first find all-must overlaps, then expand within optional attendees.

Problem 3

Manual PST↔EST and GMT offset math is error-prone and time-consuming.

Solution: Automatic conversion that handles DST and tricky offsets—no manual alignment needed.

Features

Why teams rely on our planner

Overlaps on a 24h timeline

See Best/Available overlaps at a glance and pick the best slot fast, without spreadsheet gymnastics.

Must vs Optional prioritization

Guarantee Must coverage first, then optimize Optional attendance to keep decisions quick and fair.

Automatic time zones & DST

Built on IANA zones with DST and odd offsets support, so you never redo PST↔EST math again.

Workflow

Four steps to coordinated success

Everything saves locally—no account required, just pick up where you left off.

1
Configure attendees: time zones, workdays, multi-slot hours, Must/Optional.
2
Set meeting parameters: duration, date range, base timezone, granularity.
3
Generate candidates: review the per-date timeline and Top N list to choose the best time.
4
No overlap? Use the fallback view to inspect conflicts and adjust availability.

Use cases

Powering distributed collaboration

Daily standups (Pacific ↔ Mountain): prioritize Must, surface Pacific morning/Mountain noon overlaps.

Client demos (New York ↔ London): schedule around London 3-6 pm with New York morning/noon windows.

Dev syncs (US ↔ India IST): handle +05:30 automatically, recommend India morning with US evening.

Global releases (US ↔ EU ↔ APAC): distinguish core vs supporting teams using Must/Optional labels.

Family calls (Hawaii ↔ California ↔ East Coast): consider Hawaii no DST and suggest weekend comfort windows.

FAQ

Answers for global teams

How is this different from a time zone converter?

Converters show times; we plan meetings. Add participants and work hours, then see Best/Available overlaps on one 24h timeline, with Must/Optional prioritization.

Can it handle PST↔EST and DST?

Yes. Automatic IANA time zones handle DST and tricky offsets (e.g., +05:30/+05:45).

What’s the best way to schedule across time zones?

Add attendees, set duration/date range, then pick from the timeline.

Do I need an account? How is data stored?

Local-first privacy: data stays in the browser; no sign-in required.

What does Must/Optional do?

Must ensures decision makers never miss; Optional improves recommendation quality.