Prospective Soulmate Meeting Dates

As your question implies, dates when certain events are more likely to take place, or circumstances manifest, can be calculated with numerology.

The calculations generally use the person's personal birth date numbers, such as their personal year number, perhaps also the personal month and personal day numbers.

The term "soulmate" has various definitions. There is a Most Likely True Love Dates article that may provide the information you are looking for. The article has a link to a calculator to help calculate the dates.