creepyhollows wrote:

Some Keepers want to know when their spirits were born (for those who were on Earth). However, the concept of tracking time, calendar days, etc. has changed between civilizations, time periods, etc. And, for some, they never tracked time at all.

While there are times when spirits can reveal the month & day of birth (as translated into the current calender the world uses), it is best to mutually pick a day that you wish to celebrate their birth. Most entities, such as Dragons, Unicorns, Gargoyles, etc didn't track time as we do, there was no need to track days, and was more important to track other more indicative modes like Moon phases, planets, stars, etc.