12:22 Almost Every Time I Look at the Time

The reason is likely to have a connection to your ex-husband's birthday.

A person sees many numbers during the course of a day. Few are remembered.

Similarly, it is likely that you look at the time many times during the course of a day. But only the 12:22 times are remembered.

People remember seeing certain numbers when the numbers have personal meaning, are emotionally significant, or are unusual enough to note. See Why You Start Seeing Certain Numbers Again and Again for expanded information.

With the colon dividing the numbers on clocks, they are especially attractive to attention that relates to birth days. The numbers for every month and day of a year can be represented by a clock time.

Probably, when you started seeing 12:22 (started remembering it when you saw 12:22) it was because the number reminded you, perhaps subconsciously, of your ex-husband's birthday.

When you started wondering what it means, the emotional significance increased, making it even more likely that you would remember it when you saw 12:22. Why People See Certain Numbers All the Time talks about that.