Months names are all one off?

[R. Sale]

The Hildesheim example [Post #20] is interesting because it is so early, and it is a liturgical calendar. Nevertheless, it was the association of Pisces and February that became the tradition. Was the association of Pisces and March an alternate tradition? Or just an alternate preference? Both systems are historically extant, so no switch takes place. It's a matter of usage and author's choice.

If Pisces is March [Mars, Martis], then Aries is April - and April is 'Aprilis' in the historical examples, which is nothing like 'aberil' in the VMs.