It is a bit irritating when you get ready to collapse into a chair in the garden and enjoy the sun - and then the power drills, hedge trimmers, lawn mowers, etc, etc, start up. But, to be fair, when the weather is nice, it is natural that people will start sorting their gardens out.
I try and remind myself that there have probably been lovely sunny days when we have mown the lawn or the children have played a noisy game outside. Can you honestly say that doesn't apply to you too? Try not to see the noise as a deliberate act of unkindness by your neighbours (which I'm sure it isn't ) because then you will feel stressed and angry and it will become much more of an irritant.