Discover all tools tagged with CALENDAR. Private & secure, fast, and completely free in-browser tools.
Calculate days between dates, add or subtract days from any date with our free online date calculator. Supports business days calculation, multiple date formats, and instant results. Perfect for project planning, scheduling, and date arithmetic.
Track your menstrual cycle, fertile window, and ovulation day with our free online period tracker. Monitor hormone levels, generate cycle forecasts, save data locally, and export detailed PDF reports. No registration required - all data stays private in your browser.
Calculate weeks between dates, add weeks to dates, or subtract weeks from dates with our free online week calculator. Supports both calendar weeks and business weeks (Monday-Friday) with multiple date formats.
Calculate week numbers from dates or find dates from week numbers. Supports both North American (Sunday start) and ISO 8601 (Monday start) week numbering systems with interactive calendar view.
Convert weeks to months with precise calculations using our free online calculator. Get exact conversions, fractional displays, and detailed breakdowns with remainders in weeks and days.
Quickly determine if any year is a leap year with our instant leap year checker. View detailed statistics, historical timeline, and learn the fascinating rules behind leap years. Perfect for calendars, planning, and educational purposes.
Track your menstrual cycle with our free period tracker. Calculate next period, ovulation dates, fertile window, and cycle phases. Export detailed reports as PDF with visual calendar.
Design and export stunning printable calendars with custom events, holidays, and beautiful gradient styles. Choose monthly or yearly views, add personal events, and export as PDF, PNG, or JPEG. Perfect for planning, organizing, and personalizing your schedule.
Calculate hours between two dates, add hours to a start time, or subtract hours from an end time. Features customizable time format (12/24 hour) and optional seconds display for precise time calculations.
Calculate week numbers instantly using ISO 8601 or North American systems. Convert between dates and week numbers, view interactive calendars, and understand both week numbering systems. Perfect for project planning, scheduling, and international coordination.