Find how many days between two dates or add N days to a date
Date & Time Collection
Online Date & Time Tools
Date difference, timestamp conversion, time zones, Cron parsing, timers and lunar calendar in one place.
A date and time toolkit for developers, ops and everyday scheduling: date difference and arithmetic, Unix timestamp conversion, time zone conversion, Cron expression parsing, task timers (ETA/stopwatch) and lunar calendar conversion. Everything runs locally in your browser with no data uploaded.
7Curated tools
3Workflows
3FAQ answers
Built for these intents
Convert a Unix timestamp to a readable date and back
Compare time across zones or debug timezone display bugs
Parse a Cron expression and handle timers or lunar conversion
Tools in this hub
Date Calculator
Add or subtract days, diff dates and format dates with time zone support, optionally skipping weekends and holidays for scheduling and deadlines. Skip weekends.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates with ISO 8601 output. Essential for log analysis, API debugging and cross-timezone scheduling work.
Timezone Converter
Convert any moment between world time zones with a live clock for UTC, Shanghai, Tokyo, London and more. Schedule across regions and time zones with confidence.
Crontab Generator
Build cron expressions with a visual editor and see next run times and plain-language meaning. Debug Linux crontab and Kubernetes CronJobs in seconds.
Chronometer / Stopwatch
Stopwatch with start, pause, lap and reset at millisecond precision for timing tasks, workouts and code execution, with records that survive tab reloads.
ETA Calculator
Compute estimated time of arrival from rate and remaining work with custom units for sprint planning and long-running batch task progress projections.
Lunar Calendar Converter
Convert between Gregorian and Chinese lunar dates, with zodiac, Gan-Zhi, solar terms and leap month support. Check traditional festivals birthdays with zodiac.
Suggested workflows
Date planning
Check the interval with date difference, then project a target date, converting to lunar when needed.
Cross-zone work
Convert local time to the target zone, using timestamps to align system time when necessary.
Tasks & scheduling
Parse a Cron expression for execution cadence, then estimate task duration and ETA with the timers.
How to use this date & time hub
Anchor first, then convert
For time zones or timestamps, align on the "absolute time" with the timestamp tool first, then convert to local display by zone — avoids intuition-based offset mistakes.
Group scattered time tools
Date difference, timestamps, zones, Cron, timers and lunar often appear together in one scheduling or debugging session; one page reduces tab-switching.
Local math is safer
Time data often ties to schedules and contract dates; browser-local processing keeps it off third-party servers.
Date & time tools FAQ
Which timestamp formats are supported?
Common Unix second- and millisecond-level timestamps convert to and from readable dates; see each tool page for details.
Are time zone results accurate?
They follow standard zone rules; for edge cases like DST, verify against the tool implementation, and double-check critical schedules.
Do these tools upload my data?
No. All calculations run locally in your browser and your input is never uploaded.