You're telling me it's a pain in the ar%$!
We know that as much as you do!
We'd rather do the job when it's closed but due to city's operating licence we can only do the job when it's open.
Inconvenient for the airport and airlines but the job needed to be done and I'm sure you'd all be complaining even more if the ILS had to be turned off and you're all diverting elsewhere....
Having said that, Sunday's job was unusual and took a lot longer than a usual ILS calibration job.