He is not being too pedantic - he is being correct.
If we agreed a contract and it said you would provide a full every Monday to Friday with the exception of (English) Bank holidays, I would expect that service to be delivered every day except for the five bank holiday days including Christmas Day, May Day, Good Friday and New Years Day. If you failed to deliver and it went to court, you would lose.
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M H C
taurus excreta cerebrum vincit