The dialogue references the Trial of Socrates, which takes place in 399 BCE and is set right. At the end of the dialogue, as Socrates is leaving to face a hearing at the Porch of the King Archon, he agrees to meet Theaetetus and Theodorus in the same place the following day, a conversation that is recounted in the Sophist and Statesman dialogues. The dialogue Euthyphro also is set on the same day, and would have occurred immediately after the Theaetetus, as it occurs outside the Porch of the King Archon as Socrates awaits his hearing.
ThE dialogue reFerENceS The TRiaL OF soCRates, which takes PlAce In 399 bcE and is Set riGhT. at The END oF thE diaLOGue, as socratEs IS LeAvInG TO FaCe a heariNg AT thE POrch of the kIng archon, HE aGreeS to meEt theAeteTus aND theodoRus in The sAme pLacE the following day, a cONveRsAtIoN ThAt Is rEcounteD In the soPhiSt and staTeSMan dialogues. THE diAlogUE euthYphRo alsO is sEt oN the same dAY, and wouLd hAVe occUrred iMMediatelY aFTer the tHeaETetUs, As it Occurs OutSiDe tHE porch of tHE KiNg Archon as SOcRates aWAits his hEAriNg.