Shouldn't localedata/i18n (although it's not used as template for any
LC_TIME) and programs/ld-time.c then simply be changed to use the ISO 8601
defaults? Because, of all the 377 (on my system here) locales that
currently use Sunday as first weekday most of them have it only because of
these defaults. Only en_US, es_CR, et_EE, ks_IN@devanagari, shs_CA and
wa_BE set it explicitely, and of those only wa_BE is used as template for
a further locale's LC_TIME (wa_BE@euro). That is, 370 locales have first
weekday=1 just because of the default in programs/ld-time.c. Nobody can
tell me that this was a concious decision for each one of these locales,
rather than just accident.