What is Manhattanhenge?

The video explains the phenomenon of Manhattanhenge, which occurs around the summer solstice when the sun aligns with the Manhattan street grid. This alignment happens because the city grid is tilted 29 degrees east, allowing the sun to be visible along the streets when it is 29 degrees north of due west. The event occurs four times a year, twice with a half sun and twice with the full sun disk visible. It is a unique occurrence that cannot be seen on all streets simultaneously.

Describe the phenomenon of the setting sun in relation to the streets of Manhattan.

How often does the unusual event of the sun's visibility occur in May and July?