Calendars
Advanced calendar utilities for planning and scheduling. Calculate working days excluding holidays, determine leap years, finding the day of the week for any date, and generate printable calendar schedules.
Convert your Gregorian birth date into the Chinese Sexagenary cycle. Generates the Year, Month, Day, and...
Enterprise-grade leap year verification. Features a visual algorithm pipeline, developer code snippets (25+ languages), range generation,...
Calculate the exact days, hours, and minutes until any future event. Features a comprehensive database of...
Professional-grade date interval engine. Features multi-national holiday databases, adjustable weekend logic, and precise duration breakdowns (Unix...
Calculate future or past dates by adding/subtracting years, months, and days. Includes business day logic excluding...
Plan your 2026 vacations around your 1/3 shift schedule. Features official holiday highlighting and overlap detection.
Interactive Nativity Fast planner tracking the 40-day Old Calendar Advent (Nov 28 - Jan 6). Calculates...
Interactive 2026 shift calendar for emergency services (1/3 schedule). Track work shifts, plan holidays, and sync...
Calculate your 2 Work / 2 Rest schedule for 2026. Features an "Exceptions" system to handle...
Calculate the exact number of days, weeks, and months between two dates. Includes options for business...
Determine the variable start date and duration of the Apostles' Fast, which depends on the date...
Visualize the 3-days-on, 3-days-off pattern. Includes a monthly hours calculator for payroll estimation based on shift...
Advanced deadline calculator with dynamic holiday logic for 30+ countries. Exclude weekends, calculate date ranges, and...
Calculate specific "Zentag" weeks in the Orthodox calendar where fasting is suspended. Identifies Publican & Pharisee,...
Generate a dynamic weekly fasting schedule for Great Lent based on the date of Orthodox Easter...
Generate custom printable calendars for any month and year. Add events, choose week start day, highlight...
Calculate the exact date 180 days from today or any start date. Includes settings for business...
Calculate exactly what date is 100 days from today, or any custom date. Options to add,...
Generate calendar date matrix grids for any month. Configurable first day, locale, weekday format. Export as...
Convert any Gregorian date to the Discordian calendar. Get season, day, YOLD year, holydays, and custom...
Convert any Gregorian date to the Pataphysical Calendar. Get the Pataphysical year, month, day, saint, and...
Professional ISO-8601 and US standard week calculator with reverse lookup, fiscal year mapping, and precise project...
Determine the exact day of the week for any date in history. Features Julian/Gregorian support, famous...
Calculate the exact duration between two dates. Exclude weekends, holidays, and customize output for project management...