It's been my experience that solar correspondences are often
ignored in favor of lunar correspondences. Considering that solar energy is regarded as masculine, and generally associated with the god, this is not really surprising as the god is often ignored in favor of the goddess by many pagans. But
it can be useful, especially if you need to do
a positive(increasing) working during the waning moon.

If you need to do a positive working during the waning moon,
it can be done during the daylight hours with noon being the peak,
or height of power. By noon I do not mean 12:00 PM, I mean the exact
middle of the daylight hours, halfway between dawn and dusk. Use an
almanac to determine the exact times.
This can also be used anytime you need to do a daytime
working, not just in the waning moon.
This would also be appropriate if you are doing a working based on solar energy or if you are are doing a ritual to honor a sun deity.

The Sun's energy is also stronger at certain times of the year.
Solar energy is at its strongest on the Summer Solstice, on or around
June 22 if you are North of the equator, on or around December 22nd
if you are South of the equator. Again, check an almanac for the exact
dates.

Solar energy is at its softest at the Winter Solstice, on or around December 22nd if you are North of the equator, on or around June 22nd if
you are South of the equator. Bear in mind Solar energy can be used at
any time of the year, these are just the stronger and weaker points.