Father Time is an NPC featured in The Sims 2: Happy Holiday Stuff. He looks like an old man with a long beard, and holds an hourglass. He bears a striking resemblance to the Therapist and Santa Claus. When a Sim throws a New Year's bash, he will appear at 11 PM.
When he appears, he will be standing on the sidewalk, so a selectable Sim will need to call him over. The only interactions available for Father Time are talk and call over, which will be available no matter how close a Sim is to him. Around midnight, (12 AM), he will start making a ruckus, which all the Sims at the party will join, and will then transform into Toddler New Year.
Unlike most other NPCs, Sims will have memories of meeting Father Time, although he will not appear in the relationships panel and can't be called due to him being an object, and not an actual Sim. Santa Claus also has this behavior. If a New Year's Bash is shut down by police at 11 PM, when Father Time arrives, he will immediately leave. Despite having the appearance and voice of an elder, he is actually treated as an adult by the game.