Notification Question

Hi everyone, I thought I would reach out to everyone to see if you had some ideas that might work for implementing a notification box or similar which would appear during checkout and notify customers of upcoming Holidays. For example, we have a Holiday coming up on Monday and there will be no USPS shipping available, so we'll have to ship any orders placed Sunday or Monday on Tuesday instead. I'd like to implements something where I could input a simple message and activate for situations such as this for my customers instead of sending out an email blast to all customers. Thanks everyone and have a great weekend


P.S. I know I can make a Joomla module, but I was curious if anyone else was using a feature with Hikashop to accomplish this.

Hugs,

Natalie