ok here is the matchmaker times and age,
the matchmaker usually come at 10:30am, 3:00pm, and 7:00pm, she usually come at 5yr old and up, but she usually come to me at 7yr old. you can set the time 1 minute bfore the times i listed above to make her come earlier, if she doesnt come, it may be because she is not ready, so try it again at a later age. the matchmaker will not come when your tamagotchi turns into an oldie.
hope that helped
sincerely,Tamapal3000