Also, IMO, it’s putting the burden of knowing and managing your schedule on the other person. You expect them to be paying enough attention to you to remember when you come back and to resend their request. That’s not reasonable.
Q. If I need help activating a new phone or another type of phone service from Rocket Wireless during winter break, will I be able to reach someone?

Research shows that vacations are beneficial to our physical and mental health, work performance, and productivity. To replicate this research, I’m conducting a participant observation study until DATE, and will be out of the office. In the interim, if you have an urgent request, please reach out to EMPLOYEE. Otherwise, I’ll be in touch upon my return.
My OOO is almost always “I’m out of the office and will be returning on x date.” My email sig has instructions along the lines of “for questions on x, email this list” for a couple of the more common areas people would contact me about that might need an urgent reply (as the lists go to more than just me, obviously), but most people have finally figured out to contact those lists to start with, anyway. If I were in the middle of a project or something that needed to be moved along in my absence, the project teams usually know when we’re out, but I’d put a back up in that case, if needed, but generally there’s not much to be gained by a longer OOO from me.