лѣто

лѣто • (lěto) n

1. (obsolete) Pre-1945 spelling of лято (ljato).

Old Church Slavonic Wikipedia has an article on:

лѣто

Wikipedia ^cu

From Proto-Slavic *lěto (“year”).

лѣто • (lěto) n

1. summer
2. year
   • from Vita Constantini, 0600400:

     бѣ же тъгда философь к҃ и д҃ лѣтомь.

     bě že tŭgda filosofĭ k: i d: lětomĭ.

     At that time the Philosopher was 24 years of age.

From Proto-Slavic *lěto.

• Hyphenation: лѣ‧то

лѣто (lěto) n

1. time
2. year
   • 1377, Dmitry of Suzdal, Laurentian Codex‎, page 1:

     Се повѣсти времѧньнꙑ^х лѣ^т.

     Se pověsti vremęnĭny^x lě^t.

     This is the tale of bygone years.

3. summer

• Old Ruthenian: лѣ́то (lě́to)
  • Belarusian: ле́та (ljéta)
  • Carpathian Rusyn: лї́то (ljíto)
  • Ukrainian: лі́то (líto)
• Russian: ле́то (léto)

• Sreznevsky, Izmail I. (1902) “лѣто”, in Матеріалы для Словаря древне-русскаго языка по письменнымъ памятникамъ [Materials for the Dictionary of the Old East Slavic Language Based on Written Monuments]‎ (in Russian), volume 2 (Л – П), Saint Petersburg: Department of Russian Language and Literature of the Imperial Academy of Sciences, column 77

лѣ́то • (lě́to) n inan (genitive лѣ́та, nominative plural лѣта́, genitive plural лѣтъ)

1. Pre-1918 spelling of ле́то (léto).