📅
Date Difference Calculator
Calculate date differences and add/subtract days
⏳
Countdown Timer
Real-time countdown to any target date and time
📅
Business Day Calculator
Calculate required days excluding weekends and holidays
🗓️
Japanese Era Year Converter
Convert between Japanese era years and Gregorian calendar
📅
Holiday Calendar
View Japanese national holidays with auto-calculated substitute holidays
🔮
Rokuyou Calendar
Check Rokuyou (Japanese lucky/unlucky days) for any date
🎂
Age & School Year Calculator
Calculate graduation years automatically for resumes
🌍
Meeting Time Zone Finder
Find overlapping work hours across multiple time zones
🎧
Ambient Sound & Timer
Mix ambient sounds to maximize focus