To solemnize a marriage means that during Lent the nuptial mass cannot be celebrated, this is most certain during Holy Week since it is a privileged week the same also applies during Easter octave. This means that there are during these 2 weeks no commemorations, those days take precedence, no exception. Tomorrow is the feast of the Annunciation which will be moved to the day after Low Sunday.
However I am pretty sure the exchange of vows can be performed without the Mass. Correct me if I'm wrong.
Maria dolorosa
Ark.