Default voicemail greeting for company-level holiday hours

[josh_swr]

In the company overview account settings, I am able to set the default voicemail greeting for most things, however it seems I can't do it for holiday hours. 

I've got standard holidays programmed in for the whole company which apply to all extensions. As far as I can tell it only lets me change the voicemail greeting per holiday, per auto receptionist/call queue/user, which is just way too much manual work for the number of destinations we have.  

Am I missing something, or is there truly no way to do this?