Dates and Rumours

[Staring Death]

For the first few days of Mistlocke, the calendar may not have been up to date.

While trying to figure out the dates for an historical book of EfU:M, two posts state dates in Ches, days after the server was up.
Talir's 10 of Ches
Iron Oligarch 12 of Ches

And a few days later, the date jumps (or goes backward) to Hammer
Cluckyx' 17 of Hammer

While mostly inconsequential, I wonder if the dates could be corrected (if we go by a day by day basis, the two first events should've happened in Hammer).

Otherwise, I'd just like to know if we consider that the Mist started lifting in Hammer or in Ches.