Adiyen Svami, this is regarding the forthcoming solar eclipse. It is mentioned in the Panchangam that the grahana sparsam (start of eclipse) is at 5 PM and that one is not to partake of food on that day. If so, should one not partake of food the entire day on the 25th or can one partake in the morning, and partake of food after sunrise the following day?

For a solar eclipse, leaving aside the jAmam (3-hour period) in which the solar eclipse occurs, it is mentioned that one must not partake of food for 4 jAmam (12 hours) before the eclipse. This eclipse occurs in the 4th jAmam of the daytime. So, the 4 jAmam before this means that one must not partake of food after 3 AM of the previous night. After the conclusion of the eclipse, one can partake only after looking at the sun.
On this occasion, since the eclipse is during the evening and the sun sets during the duration of the eclipse, which makes it not possible to look at the sun. As per the Pachanga, since one is allowed to partake of food only after looking at the sun after the eclipse, one will be able to do so only on the morning of the following day.
As per the scriptures, one must not partake during the entire day on the 25th.