Wow, that seems to have got closer, thank you. Spreadsheets are now created with Australian locale, although they have now lost their default timezone completel

Wow, that seems to have got closer, thank you. Spreadsheets are now created with Australian locale, although they have now lost their default timezone completely. I'm interested whether this change will affect other Google products, in particular whether it messes up the operation of Google Assistant on my phone (possibly that can be overridden). Cheers!