Definition of "regnal" []

• Being a specified year of a monarch's reign calculated from the date of accession: in her 12th regnal year. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In the 1960s Parliament typically would pass sixty or seventy Acts of Parliament in every regnal year."
• "May 14, 2010, 6: 37 pm reader says: counted from “the Independence of the United States of America” (perhaps an echo of the British legal practice of using regnal years?)"
• "The Date Clause of Article VII mentions the date the Constitution was signed, and also gives the year as counted from “the Independence of the United States of America” (perhaps an echo of the British legal practice of using regnal years?)."