Further behind, timewise

• Less punctual
• Like a student arriving ten minutes after the bell, as opposed to five
• More belated
• Not as timely
• Dire art (anag) — more delayed

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Tardy \Tar"dy\, a. [Compar. Tardier ; superl. Tardiest .] [F. tardif, fr. (assumed) LL. tardivus, fr. L. tardus slow.] Moving with a slow pace or motion; slow; not swift. And check the tardy flight of time. --Sandys. Tardy to vengeance, and with mercy brave. ...

WordNet Word definitions in WordNet
See tardy

Wiktionary Word definitions in Wiktionary
a. (en-comparativetardy)