For the last three months of the Shamsi year (Dey to Esfand / January to March): 4. Quick Reference: Historical Milestone Conversions Shamsi Year Miladi Year Range Significance 1 622 – 623 CE The Year of Hijrah (The Epoch) 1300 1921 – 1922 CE Dawn of modern industrialization in Iran 1357 1978 – 1979 CE Iranian Revolution 1400 2021 – 2022 CE Entrance into the new Shamsi century 1405 (Current) 2026 – 2027 CE Current active calendar year 5. Step-by-Step Manual Conversion Method