Phineas and Ferb/Milo Murphy timeline

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They established that Melissa's fear of rollercoasters is due to PnF's coaster crashing down on the first day of the summer before. Also, Zach specifically mentions the year before as being 20/16 when recalling his days in a boyband. Does this mean Phineas and Ferb takes place in the summer of 2016? That wold be kind of funny considering the fact that the last episode aired in 2015.