Note: I'm no longer maintaining this tool out of lack of interest and lack of time.
There are other, better tools available, such as this one: https://wflists.net/clock/
Clock website for the Plains of Eidolon. https://clockofeidolon.com
Measures time in Warframe's Plains of Eidolon. Maps the 150 minute cycle to a full 24-hour time display.