On-Call Timezone Overlap Finder

Find working-hour overlap and ideal handoff times across a distributed, follow-the-sun on-call team.

Runs 100% in your browser. Nothing you enter is uploaded or stored.

Name
Timezone
From
To
Name
Timezone
From
To
Name
Timezone
From
To

Coverage by UTC hour (how many people are within working hours):

0
00
0
01
0
02
0
03
1
04
1
05
1
06
1
07
2
08
2
09
2
10
2
11
1
12
1
13
2
14
2
15
1
16
1
17
1
18
1
19
1
20
1
21
0
22
0
23
Best overlap
08:00–12:00 UTC
2 of 3 online
Peak coverage
2/3
Most people online at once
Zero-coverage hours
6
00:00, 01:00, 02:00, 03:00, 22:00, 23:00

Related tools

MTTR Calculator

Compute Mean Time To Resolution (and MTTA) from incident timestamps, with downtime-cost estimates.

On-Call Rotation Builder

Design fair on-call rotations with primary and secondary layers and export them as an ICS calendar.

Alert Fatigue Calculator

Quantify pager fatigue from alert volume, actionability, and after-hours pages.

Slack Block Kit Alert Builder

Build and preview a Slack incident-alert message and export the Block Kit JSON.

Webhook Payload Formatter

Format, validate, and pretty-print alert webhook payloads for Opsgenie, Alertmanager, and generic sinks.

PromQL Builder & Cheat Sheet

Build common PromQL queries from a guided form, with an inline cheat sheet.

From the makers of these tools

Run production tasks with agents you can trust.

BitSentry turns recurring investigations into reusable runbooks your agents follow step by step, with AI-explained evidence and a full audit trail.

Try BitSentry Desktop Free