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Reading the recently released Best Practices for Recording Chronological Data in Bibliographic Records got me curious about the status of EDTF. At https://www.loc.gov/standards/datetime/#:~:text=The%20Extended%20Date%2FTime%20Format,a%20wide%20variety%20of%20applications <https://www.loc.gov/standards/datetime/#:~:text=The%20Extended%20Date%2FTime%20Format,a%20wide%20variety%20of%20applications.> dated February 4, 2019, we can read the EDTF draft standard. But at https://www.loc.gov/standards/datetime/background.html dated October 2019, we're advised that "EDTF functionality has now been integrated into ISO 8601-2019, the latest revision of ISO 8601, published in March 2019." We're further advised that "The draft specification is no longer publicly, readily available, because its availability has caused confusion with the official version. It has been archived and is available for research purposes from the Library of Congress upon request." The first page above has a link labelled "Background" which now connects to the second page above. Meanwhile, LC's Descriptive Cataloging Manual, Z1, 046 instructs us to use ETDF for formulating dates. Is the web access to EDTF now unintended, or is the current Background statement misleading about the status of EDTFas a standard? Has EDTF been superseded by ISO 8601-2019? Thanks, Stephen -- Stephen Hearn, Metadata Strategist Data Management & Access, University Libraries University of Minnesota 170A Wilson Library (office) 160 Wilson Library (mail) 309 19th Avenue South Minneapolis, MN 55455 Ph: 612-625-2328 Fx: 612-625-3428 ORCID: 0000-0002-3590-1242