spring ties
when the sun moon and earth all line ua at new or ull moon (as in the pictur) then we get the highst (and indeed lowest) tids which are called spring tides (nothing to do withthe time of yea).
infact it takes a bit of time for the enomous mass of water to move so the spring tide will actually occur a couple of days after th new moon.
because of the tilt of the earth on its axis at the equinox the sun appeasto be over the rquator and if there is a new o full moon at abou the same time then all the forces contive to create the highest o high tids and if the moon is also at peigee (closest to the earth in its obit) then that will produce the biggest tids of all.