Romulan calendar
- Units
- Ewa (Romulan second)
- Dierha (Romulan hour)
- Eisae (Romulan day)
- Khaidoa (Romulan month)
- Fvheisn (Romulan year)
- Months
- Tasmeen (ENT Novel: The Good That Men Do)
- At least twenty-one days
- Tasmeen (ENT Novel: The Good That Men Do)
- Correspondences
- Nearly three fvheisn between April 17, 2152 and early February 2155 (ENT Novel: The Good That Men Do)
- Between "Minefield" and chapter 4 of The Good That Men Do
- Tasmeen 5, year unknown > January 24, 2155 (ENT Novel: The Good That Men Do)
- January 30, 2155 > Tasmeen 11, year unknown > February 3, 2155 (ENT Novel: The Good That Men Do)
- February 9, 2155 = Tasmeen 21, year unknown (ENT Novel: The Good That Men Do)
- Nearly three fvheisn between April 17, 2152 and early February 2155 (ENT Novel: The Good That Men Do)