It may be pointless but it is nice. I mean, in lore, they record events using years, so obviously there must be some lore established calendar already in game.
On a slightly unrelated note. What's the date of the events at Helgan? I know its 4E 201, but what day of the week and what month does that all take place?
There is established lore. It's just that they haven't made much use of it in this game. I'd say this is one of few valid complaints from oldschool people about the dumbing down of the series.
For example, the "3rd of Hearthfall" is a holiday, like a twisted version of Halloween. "Tales and Tallows", a celebration of Necromancy. I could see cool (maybe even funny) quest potential here.
No other holiday divides the people of (this city) like the 3rd of Hearth Fire. A few of the oldest, more superstitious men and women do not speak all day long for fear that the evil spirits of the dead will enter their bodies. Most citizens enjoy the holiday, calling it Tales and Tallows, but even the most lighthearted avoid the dark streets of (this city), for everyone knows the dead do walk tonight. Only the Mages Guild completely thrives on this day. In celebration of the oldest magical science, necromancy, all magical items are half price today. Or the 30th of Frostfall. "Emperor's Day". They should include this and bring in those goblins from the GameJam vid.
Once the 30th of Frostfall, the Emperor's Birthday, was the most popular holiday of the year. Great traveling carnivals entertained the masses, while the aristocracy of (this city) enjoyed the annual Goblin Chase on horseback. Recently, these traditions have fallen into neglect. It has been decades since there was a big carnival in (this city) and longer still since a (mayor?) of the (this city) sponsered a Goblin Chase.