Clue: Our moment the mark of love — guarantee a number captivated by 100-year celebration finally coming around (9,9)
Answer: CROSSWORD CENTENARY
Explanation: Definition: Our moment
The answer was pretty obvious, but this one took me a while to explain: I think it's CROSS (X = kiss being a "sign of love") + WORD (guarantee) + TEN (number) in anagram of C (100) YEAR [celebratio]N