Not important at all is just a name for football on a sunday, they have this every week of the season, 8 months.
It is usually two games one at 12.30 and another at 1.30.

Unless it involves one of the local teams outside the top 4-5 clubs, it is not important at all, it is played in every pub/bar and usually ignored.

Since football is on tv 7 days a week, no one gives a shit they also show two football games at 12.30 and 5pm the previous day on saturday, so no one gives a shit.