I'm in the process of updating our object Date data standards and am interested in the answer to Rupert's question as well! Frances On Thu, Oct 25, 2018 at 4:00 PM TMSUSERS automatic digest system < [log in to unmask]> wrote: > There is 1 message totaling 211 lines in this issue. > > Topics of the day: > > 1. Pre-Gregorian dates > > To unsubscribe, send an email to [log in to unmask] with the > following commands in the body of the email: > > signoff TMSUSERS > > // eoj > > > You will receive a confirmation that your subscription has been removed. > > ---------------------------------------------------------------------- > > Date: Thu, 25 Oct 2018 10:30:32 +0000 > From: "Shepherd, Rupert" <[log in to unmask]> > Subject: Pre-Gregorian dates > > Dear colleagues > > My apologies for this particularly pedantic enquiry. > > I'm starting to use the Events module to record historic events related to > our paintings - battles, treaties, and so on. Some of these took place > before the adoption of the Gregorian calendar. The Events module stores > event dates using the ISO 8601 format. Looking at the Wikipedia entry< > https://en.wikipedia.org/wiki/ISO_8601> for the standard, it notes that > > "ISO calendar dates before [20 May 1875] are still compatible with the > Gregorian calendar all the way back to the official introduction of the > Gregorian calendar on 1582-10-15. Earlier dates, in the proleptic Gregorian > calendar<https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar>, may > be used by mutual agreement of the partners exchanging information. The > standard states that every date must be consecutive, so usage of the Julian > calendar<https://en.wikipedia.org/wiki/Julian_calendar> would be contrary > to the standard (because at the switchover date, the dates would not be > consecutive)." > > My question is: how are you entering Julian calendar dates into TMS ISO > date fields? (This would apply to dates of creation, constituent dates, > etc., as well as to event dates.) > > For example, I currently have the Battle of San Romano< > https://www.nationalgallery.org.uk/paintings/paolo-uccello-the-battle-of-san-romano> > entered as 1 June 1432, which I'm pretty sure is its Julian calendar date; > but in the proleptic Gregorian calendar (which projects the Gregorian > calendar back to dates beyond its adoption) this would be 10 June 1432. > > I'd be interested to know who's adhering to the letter of ISO 8601, and > who's just recording Julian dates in an ISO 8601-like format. And, if > you're using proleptic Gregorian dates - are you also recording the > corresponding Julian dates anywhere, and if so, where? > > Best wishes > > Rupert > > Rupert Shepherd, PhD FSA > Collection Information Manager > [log in to unmask]<mailto:[log in to unmask]> > Tel: +44 (0)20 7747 5921 > > [The National Gallery, Trafalgar Square, London WC2N 5DN]< > http://www.nationalgallery.org.uk> > [Mantegna and Bellini]< > https://www.nationalgallery.org.uk/whats-on/exhibitions/mantegna-and-bellini > > > > To unsubscribe, send an email to [log in to unmask] with the > following commands in the body of the email: > > signoff TMSUSERS > > // eoj > > > You will receive a confirmation that your subscription has been removed. > > ------------------------------ > > End of TMSUSERS Digest - 24 Oct 2018 to 25 Oct 2018 (#2018-126) > *************************************************************** > -- Frances Lloyd-Baynes | Head of Collections Information Management Minneapolis Institute of Art 2400 Third Avenue South, Minneapolis, MN 55404 +1.612.870.3189 | [log in to unmask] | artsmia.org <http://www.artsmia.org/> To unsubscribe, send an email to [log in to unmask] with the following commands in the body of the email: signoff TMSUSERS // eoj You will receive a confirmation that your subscription has been removed.