So, when the Earth's north pole is tilted directly towards the Sun, the latter is highest in the sky (in the northern hemisphere), which is what we called the summer solstice.
(the Earth's north pole; is tilted directly; towards the Sun) (the latter; is; highest; L:in the sky; T:when the Earth's north pole is tilted directly towards the Sun)
the Earth's north pole the latter
is tilted directly is
towards the Sun
highest L:in the sky T:when the Earth's north pole is tilted directly towards the Sun