Since this work was first published after 1922 with the prescribed copyright notice, it is unlikely that this work is public domain in the USA. However, it is in the public domain in Canada (where IMSLP is hosted), the EU, and in those countries where the copyright term is life+70 years or less.
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Vienna: Universal Edition, 1925. Plate U.E. 7371
Public Domain - Non-PD US [tag/del]
||Lyrische Symphonie : in sieben Gesängen nach Gedichten von Rabindranath Tagore
||Zemlinsky, Alexander von
|Year/Date of Composition
||1923 – Vienna: Universal Edition (vocal score by Heinrich Jalowetz (1882-1946))
||Rabindranath Tagore (1861-1941)
||Early 20th century
||4-3-4-3 4-3-3-1 Percussion, Harmonium, Celesta, Harp, Soprano, Baritone, Strings
French Wikipedia article, and Discordant melody: Alexander Zemlinsky, his songs... give date of composition as finished in 1922, possibly based on a letter he wrote to Hertzka in September 1922 in which he said that that summer he had written an as-yet-untitled work in seven sections etc. (The orchestral parts were still not ready for a planned premiere in 1923- which as Beaumont notes was delayed by 364 days- but whether that means he had only finished the work in short score, or in full score, in 1922, is unclear. Still, 1922 seems more accurate for completion of at least most if not all of the work based on existing evidence.)