A World clock with Astronomical Local Sidereal time + Atomic time syncrhonization.
Stopwatch with count-down, count-up chronometer+ lap record log. City calling codes for international telephone dialling. World map with local time on 2700+ cities. Local time, UTC, Julian Date. Local Sidereal, LMST, LAST, GMST, GAST. Time synchronize to Atomic clocks. NTP, DayTime and Time protocols. Tray task bar clock. Stop-Watch, Count-down and Count-up.