Hi Tenno,
I used to maintain a Google Sheet to track of the stream times across different time zones so people would know what time the stream was starting for their time. I've now moved it to a website which is easier for me to maintain and (i think) easier to access. Each week I update the site with the stream schedule for the week after a DE staff member has posted it here on the forums - the forums are still the source of truth regarding the streams.
If this is something you'd use please bookmark the website: https://warframestreams.lol
This thread is a central location for user feedback and announcements.
Let me know what you think, cheers all.
PS. Thank you to those who have posted feedback!
Change Log 23-04-10