I was in the fourth grade when it happened. The principal told us what had happened over the loud speaker. I remember being very sad the next few days.
I wasn't born yet when it happened, but I know all about it from history class and all that.
I was at school (senior year), living in Upstate NY, and in the last class of the day. When the bell rang, the principal came in, somewhat out of breath, and informed us. Walking to the buses, some kids were crying. Spent the weekend watching the coverage in living black & white. On Sunday (Nov. 24) I was hoping to watch my beloved New York Giants play football, but the Oswald shooting prevented that.
I don't think any of the NFL games that Sunday were going to be televised regardless of the shooting of Oswald. The NFL was the only pro league to go ahead with their games that weekend and did so at the order of Commissioner Pete Rozelle who sought direction before doing so. Some colleges had played football games on Saturday, but many postponed those contests until later in the season.
(The NHL had(and still does) have a contract for a Saturday Night game in Canada which needed to be fulfilled)
Neither league had a franchise in Dallas or Washington in 1963. It would have been interesting to see whether any weekend (or earlier) games would have been postponed if there were. According to Basketball-reference, the Boston Celtics -- Massachusetts being JFK's home state -- didn't play a game that weekend. In fact, the next game they played was on Nov. 28. Could they have been given permission to postpone at least one home game after the assassination? The Bruins (NHL) were on the road and played the Leafs in Toronto on the 23rd. Their next home game was also on the 28th, a 5-3 win against the Rangers.