Date & Time
Free online tools that run locally in your browser — no install or registration.
6 tools
- Countdown Timer
Live countdown to a target date and time.
- Solar-Lunar Converter
Convert Gregorian dates to Chinese lunar calendar.
- Solar Terms Lookup
Look up 24 solar terms for any year.
- Timezone Converter
Convert datetime by UTC offset.
- Date Add/Subtract
Add days to a date.
- Week Number
Get week number of year.
FAQ
- Are these tools free?
- Yes, completely free.
- Registration required?
- No.
- Is data uploaded?
- Most tools process locally — input is not uploaded.
- Mobile support?
- Responsive layout works on phones.
- Find more tools?
- Browse categories or use site search.