so, why does the landlord wish to enter the premises?The landlord may upon advance notice and at reasonable times inspect the premises, make repairs and show the premises to prospective tenants or purchasers; and if the tenant is absent from the premises and the landlord reasonably believes that entry is necessary to preserve or protect the premises, the landlord may enter without notice and with such force as appears necessary.
ive found nothing stating there is a 12 hour notice required. The statute (cited above) states advance notice. Most states have determined reasonable notice is a 24 hour notice. I have not searched for court decisions
beyond that, the reasons for entry are very limited. Outside of those reasons a tenant can refuse to allow entry. A landlord entering outside of the allowances in the law would be trespassing.
I wokld suggest the notice provided would not be valid. The date in December 2019 was given. It’s anybidy’s Guess what was meant and as so, it is not valid.

