When setting the split-days to "every 15 minutes," the week and comparison views show incorrect time ranges for the day

Question

When I change the "split-days" interval time, under Options > Settings, to
15, or every 15 minutes, the week and comparison views don't show the correct
time range for the day.
<P>
For example, if I click View to display the calendar and then click Week to get
a weekly view, the time range displayed is from 6:00 a.m.
to 4:00 p.m. If I click Comparison to get a
comparison view, the time range displayed is from 12 p.m.
to 6:45 p.m.
<P>
In this example, should both of these views show the same time range, from
9:00 a.m. to 4:00 p.m.?
No, the two views will not necessarily show the same time range. The time
range for the comparison view will start at the beginning prefs time only
if you have something scheduled (on any day of the week) starting at that
time. For example, on one of the days during your week of comparison, if you
create an event that starts at 9:00 a.m. and then open the comparison view, the
time range displayed will start with 9:00 a.m.
<P>
Additionally, view times will expand past the configured settings if events
span past the time range. That is, if you have an event that spans from
5:00 p.m. to 8:00 p.m., the event will be reflected in the view, even though
your time range may be set to go only to 6:00 p.m.

Answer 1

Umm yes.
The settings are stored in ''prefs.js'', so you could swap various copies of this file in and out.
However, the system will load ''prefs.js'', then, if present, ''user.js'' , so you can set up just your changes in ''user.js'' .
The sort of line you need to look for is like this:
<code>user_pref("mail.server.server14.check_time", 10);</code>
You'll need to do some research to identify which of your accounts is which.
Search for the account's email address:
<code>user_pref("mail.identity.id10.useremail", "xenos&#64;example.com");</code>
Use the id number to locate the account number:
<code>user_pref("mail.account.account29.identities", "id10");</code>
Use the account number to find the server number:
<code>user_pref("mail.account.account29.server", "server14");</code>
Finally, you can then use the server number find the account's time setting:
<code>user_pref("mail.server.server14.check_time", 10);</code>
This last entry may not exist, if you have never changed the setting from the default 10 minutes.
Do be careful with your typing and copy/pasting; if the file fails the syntax parser it will silently fail.
And make sure Thunderbird is shut down when you do the swap. If it's open, it may overwrite changes, and in any case, it only reads the settings file when it starts up.