My profound apologies if this recurring topic has been definitively settled and my searches have failed to find a fix.
My Lightning calendars (4.0.6) are all sync'd with Google calendars via Provider for Google Calendar 2.7.
My time zone is UTC / GMT (London) in Windows and in Google Calendar.
If I set up a recurring entry for (say) 1030 on the first Monday of each month in Lightning, Lightning changes this in its monthly display to 1130 as soon as UK daylight saving time kicks in - ie it shows it as 1030 on 1st Feb and 1030 on 7th March, but as 1130 on 4th April.
Editing 'all occurrences' of the event shows the correct time, whichever instance I start from; but editing 'just this occurrence' shows the time advanced by one hour if I start from an instance during the daylight saving period.
The time is always correct in Google Calendar and on my iPhone.
I have fiddled with various versions of UTC in various locations, but to no avail.
Have I missed something, please?