Why does an entry after October, into S Planner, show up as one day earlier than entered?

A

AC Question

Why does an entry after October, into S Planner, show up as one day earlier than entered

When I enter into my S Planner using Task for any dates after October the Task is shown on the day previous. This problem only starts with dates after October.
There is no problem with July August and September - the next 3 months. It is only when we get to the 4th month and after that the difficulty arises. Has it something to do with being 3 months ahead.
Using the event setting posts it onto the correct date so if this is what I need to do then so be it. I am just perplexed as to why the issue arises after the 3 month period.
Rosebush
 

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