Honestly, after all these years with Yahoo mail and calendar, I am actively looking for a replacement. What a mess both mail and calendar have become. And why? Calendar colors are so dark and garish that I can't read my text in any given day. Must change all my reminders to some color that becomes chartreuse on my PC screen. And so much more. I even switched back to the "old version" of mail, but screens there are now jumping around. Please note, I am 85 yrs old and really depended on my Yahoo calendar for so many things. And, there is no option offered to switch back to the previous layout of the Yahoo calendar. I am so disappointed.
P.S. I have wasted so many hours [yes, hours!] trying to work with new email and calendar that I am exhausted. As for "ideas" on how to change/eliminate, that is really an assigned major task for Yahoo quality assurance, not me!