Time ToolsDate calculatorCalculate days between two dates, or add and subtract days, weeks, months, and years from a date.☆

Time ToolsChinese lunar date lookupConvert a Gregorian date from 1901-01-01 through 2100-12-31 locally into lunar month/day, leap-month identity, zodiac, and sexagenary year.☆

Time ToolsWork hours by time zoneCompare a meeting time across multiple IANA time zones.☆

Time ToolsAge and East Asian age calculatorCalculate exact age, next birthday countdown, and nominal age estimate.☆

Time ToolsMoon phase lookupEstimate lunar age, phase name, and illumination by date.☆

Time ToolsSunrise and sunset calculatorEstimate sunrise and sunset from date, latitude, longitude, and timezone offset.☆

Time ToolsISO week calculatorGet ISO week-year, week number, and weekday from a date.☆

Time ToolsShift schedule generatorGenerate a repeating shift schedule from a start date and pattern.☆

Time ToolsCalendar generatorCreate a downloadable .ics calendar event file.☆