Tenant does not have Expiration Date on Lease

[Mike Smith]

Hello!  I just purchased an apartment building and I am evicting the tenants.   I was given a lease by the tenant and here is the term language.    "Term.  This Agreement shall commence on 8/15/19 and shall continue as a lease for term.  The termination date shall be on ____________  at 11:59 pm.  

What does this mean?  Does it expire 8/14/20 or is it a Month to Month lease?