The stars spin around,
at heights, above and below
the earth’s equator.
On the summer solstice, the longest day of the year, the concealment of G-d’s presence is greatest (Accidental Talmudist: Summer Solstice and Judaism). While other ancient traditions mark the day of solstice in their own ways, Jewish tradition evokes the quietude of an inward reflection (Chagigah 14b). Additionally, the month of Tammuz, that always occurs around this time, is a time of introspection, as we prepare to mourn the destruction of Jerusalem, and the subsequent loss of the Temple(s).
Interestingly, the summer has already begun, according to the religious calendar of prayer, whereas the liturgy demarcates only two seasons: summer and winter, encompassing two seasons each, out of the four observed on the civil calendar. On the first day of summer, on the liturgical calendar, the Tefillat Tal (Prayer for Dew) is recited. This always occurs on the first day of Passover in the Spring (according to the four seasons model).