When will it be summer

Rumours have it that the summer is not far away. Hip Hip Hooray!
Bert contacted the DFDS to change our reservations. They informed him that we have to use the tickets this year. We are thinking about changing the dates into October instead of our departure date on the 4th of July. As we've understood well, it would be without extra costs.
We are now focusing on a cycle route around the Netherlands to stay closer to my father.