Often Seeing 4:20 on the Clock

The number 4:20 is likely to have personal meaning or emotional significance for you. That's usually how numbers are remembered.

Many different numbers are seen as one lives life day by day. But certain numbers are remembered. Sometimes people remember seeing numbers with an unusual structure (repeated digits, for example). In your case, however, 4:20 probably has personal meaning or is vested with an emotional significance.

The number 4 is your day of birth, so it would have personal meaning. I don't see the number 20 elsewhere in your chart. So it may be the number 4:20 itself, instead of 4 and also 20, that has meaning or significance.

What happens when a person wonders if seeing a number has a message or meaning for them is that the number is imbued with additional emotional significance.

The article Why You Start Seeing Certain Numbers Again and Again and the article Why People See Certain Numbers All the Time both talk about that.