Intervals that include day of the week recently causing error in org-agenda

[Justin Silverman <jsilve24@gmail.com>]

First -- apologies if duplicate post (I tried to send email with M-X 
org-submit-bug-report but I don't think it sent and 
https://updates.orgmode.org/ gives 502 bad gateway so I am not sure I 
can even check if it sent)


Until yesterday a time stamp of the following form was accepted and
didn't cause problems in org-agenda.

<2021-04-29 Thu 10:35-11:50>

However, as of a recent update (that I downloaded yesterday) I notice
that this causes an error

org-duration-to-minutes: Invalid duration format: #("10:35-11:50" 0 11 
(fontified nil line-prefix #("  " 0 2 (face org-indent)) wrap-prefix 
#("  " 0 2 (face org-indent)) org-category "cal-gmail"))
SPC ESC is undefined

What fixes this is if I remove the Weekday in the timestamp so it reads:

<2021-04-29 10:35-11:50>

I would say this is a bug with other libraries (that create timestamps
with days of the week, but I notice that base org-mode creates these
timestamps (e.g., with C-c C-d  2021-04-29 10:35-11:50 C-c C-c). In
other words, if this is the correct new default behavior / formatting
requirement for org-agenda then I would expect that the
deadline/scheduled/timestamp entering function (sorry not sure of the
correct name for things like C-c C-s and C-c C-d) would abide by this
convention.

That said, I would like the old way that was slightly less rigorous
(e.g., allowing days of the week) as some other libraries (e.g.,
org-gcal) use that format.

Thank you!
Justin