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Not really, migrating geese have always been ruled by the sun, tommorrow 6/21 is the Solstice when days in the Northern hemisphere stop growing longer and start getting shorter. Deep in their instincts geese know that they need a new set of feathers to get them ready for the migration South. Being domesticated or living in a year round climate does not change that. Only geese grown under artificial lights might excape the molt because they don't receive the clues from the sun.
On a practical note anyone that was planning on sending their goose to freezer camp, are going to have a tough time with pinfeathers up to late September.
On other practical levels it is a good time to start collecting down from your birds since it will be loose and you won't have to actually pluck it from their skin, just gently ease it out like you can do with a sheding cat or dog.
I used to pick up the decent looking large flight and tail feathers to sell to a local hobby shop who wholesaled them to other shops. They usually RETAIL for $0.50-1.00 each to people who want to use goose quils to write with, either the old fashioned way of dipping a cut quill into ink, or the new way of gluing a ball point refil inside the hollow quill. They are also in demand by people who paint fake fancy wood grain onto common wood, nothing else can produce the same effect.
If you just want to make the mess disappear set your mower to "mulch"and mow over them, the chopped up feathers are rich in nitrogen and take a while to break down so they make an excellent mid summer top dressing.