[hds]

Of course if we did add 6 months (mod 12) then we could have hot July (almost) everywhere.

And an australian christmas in June, but it would be worth it!

[jeza]

We had a white christmas in Australia... in July! ;-)

[Evbn]

It's discontinuous. To make this work, stretch the months (add/subtract days) so the tropics only have July August and poles only have Jan/Feb. Adjust holidays appropriately.

[TomatoTomato]

And you can add/subtract hours and minutes to days so that the sun rises and sets and the same time all year!

[sneeu]

See: Riyadh Solar Time.