The duration of A Summer Night is 1800.0 seconds.
The duration of Smiles of a Summer Night is 1.8 hours.
The duration of Summer x Summer is 1.5 hours.
On the equinoxes day and night are of equal duration. On the solstices the difference between day and night are their maximum (longest day for summer solstice ... shortest day for winter).
The duration of A Summer by the River is 1.42 hours.
The duration of A Dangerous Summer is 1.47 hours.
The duration of Summer in Transylvania is 1440.0 seconds.
The duration of Underbar Summer is 1440.0 seconds.
The duration of Eternal Summer is 1.58 hours.
The duration of A Swingin' Summer is 1.33 hours.
The duration of Summer Magic is 1.83 hours.
The duration of Song of Summer is 1.2 hours.
The duration of Summer of Aviya is 1.58 hours.