Today is the longest day of year 2018 Today is the longest day of the year of the current year, Pakistan Met office said on ThursdayAlthough the actual hours in the day don't change, the amount of sunshine received is longer than that of any other day, according to experts.Known as the summer solstice, this event will be followed by the start of shorter days and longer nights for countries including Pakistan located in the northern hemisphere of the globe.