[monsto]

Is this training you're to attend or lead? It kinda sounds like traiining you're giving, but I'm not sure.

Even so, what I'm hearing is that a plan was made for you that did not include you in the decision-making process; that given a choice, you would have just said "how about a different w'end?" and everything would ahve been copacetic.

It's probably beyond time, but I would suggest talking to your boss, or the scheduler (whoever that may be) and see if you could work something out. You may be surprised.