Why can Catholics no longer be baptized during Lent?
There is no restriction on baptisms during Lent:
Though baptism may be celebrated on any day, it is recommended that normally it be celebrated on a Sunday or, if possible, on the vigil of Easter (canon 856, Code of Canon Law , emphasis added).
§1 Parents are obliged to see that their infants are baptised within the first few weeks. As soon as possible after the birth, indeed even before it, they are to approach the parish priest to ask for the sacrament for their child, and to be themselves duly prepared for it.
§2 If the infant is in danger of death, it is to be baptised without any delay (canon 867).