The term "High Sabbaths" does not correspond to a widely recognized or established concept in mainstream religious, historical, or academic sources. It is not commonly found in standard encyclopedias, theological references, or scholarly literature referring to Judaism, Christianity, or other major world religions.
In some contexts, the phrase may be informally used to describe particularly significant Sabbath observances, such as special holy days within certain religious traditions that combine Sabbath-like restrictions with festival observances—such as the biblical Feast Days or "high holy days" in Judaism (e.g., Yom Kippur or the first and last days of Passover). In Christian eschatological or Sabbatarian groups, particularly among some Messianic or Seventh-day Adventist circles, the term may be used to refer to annual biblical festivals that are considered "Sabbaths" as described in Leviticus 23.
However, there is no standardized or authoritative definition of "High Sabbaths" in mainstream religious doctrine or academic scholarship. The expression appears primarily in niche theological discussions or specific religious subgroups and lacks consistent, verifiable usage across reliable sources.
Therefore, "High Sabbaths" is not an officially recognized or encyclopedically documented term in religious studies or related disciplines.