<human>: I've known my best friend for just over 13 years. He got married to his wife 1 year ago. I have recently got engaged to my girlfriend of 4 years. As 2 couples, we get along well. No major fall outs or arguments. 

In arranging my wedding, my fiancé and I have found a venue we love- and have chosen a date on one of two bank holidays in the season we're after. The other bank holiday was already taken. We have done this so everyone can have an extra day to recover and therefore enjoy themselves more. Especially those flying in from elsewhere.

Having found a date, we have also given the venue notice (but not paid a deposit). We have also now informed most of family and friends of the date. The 'official save the dates' haven't gone out yet.

The problem here is that my friend (who I was hoping to be best man) and his wife run a wedding services business. Generally receiving deposit based bookings up to 3 years in advance. It had not occurred to me that I should consult with them on the date of the wedding to see if it would cause complications for them to attend.

Best Man contacted me today very disappointed. He does indeed have a professional booking on this date. He lobbied me to change the date and to try and appreciate the situation he (and his wife) are in. He is very worried about his local reputation and the damage that may be done by cancelling his booking to attend our wedding. My fiancé does not want (under any current circumstances) to change the date. The date is over 1 year away.

My guess is that he is personally offended that I didn't respect his profession- and therefore cared not to ask him if the date suited. But what if I did ask him ahead of time? There is a good chance my fiancé would still want the bank holiday date.

I feel like I need to stick to my date but ensure he feels like I have included him in the decision. But is it too late for this?

Can you give me the gist of the text in a nutshell?
<bot>: He wants us to change the date so he and his wife can fulfil a professional commitment, but we're set on the date.