My understanding of weekend project is not that it was developped in one weekend, but that it has been developped in evenings/weekends by someone who has a day job.
So it's not really saying it was developped in less than 48 hours, just that it's not their full-time gig.
So it's not really saying it was developped in less than 48 hours, just that it's not their full-time gig.