Some reject the date of 1880 and claim the dates 270 and 1530 hold no historical significance and were only obtained by back-dating from 1880. They also point out that while there is Biblical authority to use the symbol of one day for a year (Num 14:34; Eze 4:6), there is no Biblical authority to use one day as a century or one hour as a century, which the Church of God (Restoration) uses to get the 350 years of the Protestant age and the 50 years of the silent time.