What was the OP asking?
Looked to me like it is, why doesn't my recurring monthly event created
10/10/2015 and recurring until 10/10/2030 appear in "Find Events".
The "Find Events" search doesn't have the capability to show recurring
events. There is no column header for recurring events.
In the original event the start and end date were 10/10/2015 and I
selected "All day event" since the OP didn't specify a start and end
time in their original steps to reproduce.
When I edited all occurrences to end on 10/10/2030, it appeared daily
from 10/10/2015 until 10/10/2030 and froze my application.
With Thunderbird closed I renamed the calendar-data folder in my profile
to bad-calendar-data then restarted Thunderbird to recreate the
calendar-data folder and recovered from there. :)
I would leave the end date at the default 10//10/2015.
I'm not in the habit of creating recurring events, and probably would be
deleting any occurrence from 2015 to 2019 when they occurred in this
scenario.
Any help you can provide the OP would be welcome.