if you run a seasonal business, then you have no excuse for not serving your customers effectively, no matter when they have a need.
For example, if you’re an accountant and deal mostly with income tax for individuals, you cannot complain to your clients about how busy you are during tax season.
If you are the student services office at a university and you know your busiest time of year is the three weeks either side of the first day of semester one, you have no excuse for not serving your students during this time.
If you cannot answer the phone during your busy season, it’s not your clients’ problem. It’s your problem. Because your clients, customers and collaborators don’t have three weeks to wait for you to pick up the phone. They’ll simply call the next option on their list. As long as their call is answered, you’ve lost a customer.