Sympathies/empathies/solidarity on the sleep issue, that's miserable. :(

At the moment I'm sleeping from 3am/4am til 11am/noon, and I'd really like to reset to midnight til 9am

- MUCH better for medical appts and errands,

- and also the sleep I get at 3am/4am isn't as good quality as the sleep I get at midnight

- and also, as the weather here warms up, sleeping til 11am/noon will
a) not be possible, or
b) result in waking up severely dehydrated and with heat exhaustion...