May 1

Kalends
Ludi Florales / Floralia
Dedication of the temple of Bona Dea
Laribius (Celebration of the Lares Praestites or Lares Publici)
475 B.C. - P. Valerius triumphs over the Veientines and Sabines
326 B.C. - Q. Publilius triumph over Samnites.
110 B.C. - M. Livius triumph over Macedonians and Scordiscans.
A.D. 304 - Persecutions begin
A.D. 305 - Galerius became co-emperor as part of the Tetrarchy
A.D. 310 - Maximinus Daia became co-emperor.
A.D. 311 - Galerius' Edict of Toleration
A.D. 408 - Emperor Arcadius died
A.D. 1936 - Death of A. E. Housman

References:

• "Hints for Teachers," by Willis A. Ellis. The Classical Journal, Vol. 31, No. 8. (May, 1936), pp. 516-520.
• Rogue Classicist's This Day in Ancient History: pridie kalendas maias
  This Day in Ancient History

  
  Daily Quiz

  Ancient Rome and Ancient Greece

  On the inaccuracy of This Day in Ancient History