When honoring someone or something, we may use the phrase "day of remembrance." However, there are other words and phrases that convey a similar sentiment. An "memorial day" is a day set aside to remember a particular event, person or people who died. A "commemorative day" is another synonym which implies the marking or remembering an important occasion or event. "Memorializing day" is yet another phrase with a similar meaning. Other words to consider are "tribute day," "memorialization," and "remembrance day." Whatever the words we use, the sentiment remains the same: to honor and remember those who have impacted humanity in some way.