[tz] [PATCH 2/5] Mention more POSIXRULES bugs
eggert at cs.ucla.edu
Tue Feb 23 07:05:05 UTC 2021
Makefile | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 3f4b123..0dc44ae 100644
@@ -45,9 +45,9 @@ LOCALTIME= GMT
# Any other value for POSIXRULES is obsolete and should not be relied on, as:
# * It does not work correctly in popular implementations such as GNU/Linux.
-# * It does not work in the tzdb implementation for timestamps after 2037.
-# * It is incompatible with 'zic -b slim' if POSIXRULES specifies transitions
-# at standard time or UT rather than at local time.
+# * It does not work even in tzcode, except for historical timestamps
+# that precede the last explicit transition in the POSIXRULES file.
+# Hence it typically does not work for current and future timestamps.
# In short, software should avoid ruleless settings like TZ='EET-2EEST'
# and so should not depend on the value of POSIXRULES.
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