Directory
Every calculator and converter on EpochKit, in one place. All of it runs in your browser — nothing you type is ever uploaded.
Core
The main toolkit — a live instrument panel plus the converter, batch tool, timezone comparison, and countdown builder.
Convert Unix time to a readable date and back, with auto-detected precision.
Convert a whole list of timestamps or dates at once, export as CSV.
Copy-paste epoch time snippets for common languages.
Live clocks across any set of cities or IANA zones.
Build a live countdown to any date, with quick presets.
Calculators
Everyday date math — differences, shifts, ages, and calendar facts.
The exact number of days, weeks, and months between two dates.
Shift any date forward or backward by a day count.
Exact age in years, months, and days, plus total days lived.
Working days between two dates, excluding weekends and holidays.
What weekday any past or future date falls on.
The ISO 8601 week number for any date.
Is a given year a leap year, and which years come next.
Reading
Longer-form explainers for the concepts behind the tools.
Current epoch and conversion snippets across 9 languages.
Why Unix time breaks on 32-bit systems, with a live countdown.
Scheduling
Free alternatives to paid or signup-gated meeting planners, plus a couple of genuine gap-fillers.
Compare timezones on one grid, find overlapping hours, no signup.
When clocks change for any timezone, calculated live.
What PST, IST, CET, and other abbreviations really mean.
12-hour ⇄ 24-hour time, plus NATO zone letters.
Developer
Scheduling, integration, and messaging utilities for people who write code.
Build a schedule, or paste one for a plain-English explanation and next run times.
Excel, .NET ticks, Mac HFS+, GPS time, and Julian day number.
Dynamic <t:> tags in all 7 Discord display formats.
Dynamic date/time markup for Slack messages.
More tools are in progress — check the sitemap for the latest additions.