Actually it depends on the platform.For a standalone product I think this advice is correct. However if you are building a game or publishing on a specific pla

Actually it depends on the platform.For a standalone product I think this advice is correct. However if you are building a game or publishing on a specific platform launch dates do matter as they provide your most significant visitor boost from the platform. This is important because your future exposure might be permanently damaged because of a bad initial launch. An example of this is avoid launching indie games on mass sales events or over christmas.