I just want a nice simple extra button press to let me get at the dimmer Please

A timed auto dim would be great but it would need to be tweakable as in summer it gets dark about 11pm and in winter it gets dark about 5pm and if there is any empegs residing further north i am sure they agree
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P.Allison fixer of big engines Mk2+Mk2a signed by God / Hacked by the Lord Aberdeen Scotland