SUMMER solstice in the Northen Hemisphere *

The SUMMER solstice occurs when a planet's rotational axis,

in either Northern or Southern Hemispheres,

is most inclined toward the star that it orbits.

EARTH's maximum axial TILT toward the Sun is 23° 26′. 

This happens twice each year (once in each hemisphere),

at which times the Sun reaches its highest position in the sky

as seen from the north or the south pole.

This year 2016 occurred on 20th JUNE at 22:34 hrs (Solar Time).

In SPAIN having 2 HOURS difference the clocks showed

00:34 A.M. on Tuesday 21st JUNE.

https://en.wikipedia.org/wiki/Summer_solstice