How about gifting him tickets to a cultural history lecture series or a conference focusing on his interests? You could also look into gifting him a subscription to a cultural history magazine or a book series centered around historical events or figures. Another great option could be booking a guided tour of a historical landmark or museum that he's interested in. Lastly, you could gift him with a voucher to an online history course that he could take at his own pace. I hope this helps!
Or you can get him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.