I was just looking at this UFC honours website and at the beginning of December they will announce the nominee's where fans can vote in the following categories.
UFC Knockout of the Year
UFC Submission of the Year
UFC Event of the Year
UFC Comeback of the Year
You can vote at: https://www.ufc.com/honors
For more information: https://www.ufc.com/news/ufc-announces-ufc-honors-introducing-end-of-year-fighter-awards
UFC Knockout of the Year
UFC Submission of the Year
UFC Event of the Year
UFC Comeback of the Year
You can vote at: https://www.ufc.com/honors
For more information: https://www.ufc.com/news/ufc-announces-ufc-honors-introducing-end-of-year-fighter-awards