If memory serves, Friday 13 of April 2029 (2+0+2+9=13) is Good Friday. I remember because I remembered seeing something on the local TV news, maybe close to 2 decades ago, about a near earth asteroid predicted in 2029, which I thought of after reading about the comet in some 3 days of darkness prophecies. I think that asteroid is way too small and far away to be of any significance as the comet, but it got me wondering about the 3 days lining up with Holy week, and 100 years since the Fatima message was revealed, and some picture riddle with the date in it, and it all lined up to holy week of April 2029. But, one prophecy of the 3 days of darkness I read recently suggested it may happen in January.