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🌍 Timezone Calculator

Find call times that don't wreck either of your sleep schedules.

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What healthy LDR call rhythms look like

One mistake we see often: trying to talk every day for an hour. It sounds romantic but it burns out fast. A pattern that holds up better:

  • One long call per week (60–90 min) at a time that's reasonable for both. Treat it like a real date — phone away, no other tab open.
  • Two or three short check-ins (10–20 min) during the week. Just-before-bed for one of you, just-after-coffee for the other.
  • Asynchronous voice notes across the rest of the week. Reduces the pressure of being available at exactly the same time.

The goal is not maximum minutes — it's the feeling of being present in each other's daily life.

Frequently asked questions

How is 'overlap' calculated?

We compute the intersection of your two preferred waking hours across a 24-hour day. If you said you're available 8 AM–11 PM in Lisbon and they said 9 AM–10 PM in Singapore, we find the hours that are inside both windows and return them in your local time.

What if we want to call at the same local time?

Use the 'mirror' option — it shows the time in their city when it's e.g. 9 PM in your city. Useful when one of you wants to be the one staying up late.

Does this handle daylight saving?

Yes — the calculator uses your browser's Intl APIs, which respect each city's daylight saving rules for the current date.

Can I save my partner's city?

We don't store anything on a server, but your browser will remember your last pick locally until you clear it.

Is there a sleep-impact warning?

Yes — if the suggested call time is between midnight and 5 AM in either city, we'll flag it. Chronic sleep disruption is one of the biggest stressors in long-distance relationships.