get day start time in swift
extension Date { var startOfDay : Date { let calendar = Calendar.current let unitFlags = Set<Calendar.Component>([.year, .month, .day]) let components = calendar.dateComponents(unitFlags, from: self) return calendar.date(from: components)! } var endOfDay : Date { var components = DateComponents() components.day = 1 let date = Calendar.current.date(byAdding: components, to: self.startOfDay) return (date?.addingTimeInterval(-1))! } } //Usage: let myDate = Date() let startOfDate = myDate.startOfDay let endOfDate = myDate.endOfDay