Hashem’s Shabbos

Sefer Yashrish Yaakov explains that on this Shabbos, we are already prepared for Pesach. We have already given matzohs to the poor and we have joyfully learned the halachos and all of the dinim. This is a cause of great joy and pleasure to Hashem, to the extent that this Shabbos could be called ‘Hashem’s Shabbos.’ Thus, the ‘Gadol’ of ‘Shabbos Hagadol’ is Hashem. Since He is full of joy on this Shabbos, it is called ‘the Shabbos the Great One.’