The Hebrew word for “honor” in the 5th commandment is kbd. Kabod is a word when used of God means to glorify. It’s base meaning is substance or weight. So the 5th Commandment is a kind of transition from the laws mostly focused on God (command 1-4) and those focused on actions between people (5-10). The first four point is toward God as our only one worthy of worship. A kind of secondary glory is for parents. Like God who is the source of all things, a provider and a sustained, parents gave us life, protected for us and kept us together until we also became adults.
To honor Father and Mother should be more than flowers, a card and some sentiment. It should be respect, appreciation and care.