Q. When is the correct time for eating matza this year, Monday day (Pesach Sheni) or Monday night?
Thank you
A. On question 160 we wrote: "There are different traditions in regards to eating matza on Pesach Sheini, or the “second Pesach” given to those who were unable to bring the first sacrifice of Pesach.
There are those who eat matza at the time the korban would have been brought, which is in the afternoon of the fourteenth of Iyar, (Sunday this year – Avnei Nezer as quoted in Klei Chemda, Vaetchanan). This seems to be the prevalent costume according to Nitey Gavriel (Peasch 3,57)
Others (Dvar Yehoshua 4,5 et. al.) maintain that the proper time would be at night (Sunday night this year) as that would have been the time for consuming the korban, in the days of the Bais Hamikdosh.
Some ingest the matza at both occasions (Mikdash Yisroel, Shavuos p.141, mentions that this is the minhag of many Chasidim).
S’fas Emes, (Pesachim 89) offers a novel opinion; namely that the korban of Pesach Sheini, unlike the first, could be eaten also during the day.
And finally, there are the many who do not keep this minhag at all (Most S’fardim, Hagra in Maase Rav 181, and Lithuanian Jewry according to Rib’bos Ephraim 2,129).
Horav Shlomo Miller’s Shlit’a opinion is that one should maintain his own minhogim and traditions.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit'a