Updated, see below
As a reader pointed out to me via email, in 2023, May 13th is a Saturday, and May 12th is a Friday. The Miracle is said to occur on a Thursday, coinciding with the feast of Blessed Imelda. That feast is sometimes considered to be on May 12th or May 13th.
For 2023 to be the year of the Miracle, we would have to consider that Thursday, May 11th, would count as the vigil of the feast of Blessed Imelda. And the Miracle was said to occur on the evening of Thursday, so that consideration would work.
At this point, I don’t know what to say about the date of the Warning and Miracle. 2023 is a possible year. Otherwise, 2027 is perhaps the next opportunity.
Updated to Add: in 2023, Good Friday is April 7th and Easter is April 9th, the same days as when Jesus died and rose (according to my research in Biblical chronology).
Ronald L Conte Jr