What a piti that Garmin don't take care of their users...
Firmware 17.24 -> [17.24] Race Calender - Missing dated races
Firmware 20.32 -> [20.32] Race Calender - Missing dated races
Firmware 21.22 -> [21.22] Race Calendar Don't work again...
Firmware 23.20 -> [23.20] Race Calendar Don't work again...
Firmware 27.09 -> [27.09] Race Calendar Don't work again...
And now firmware 28.05 and the same issue... seems to be a joke