Dear Managers,
Those of you in the UK may know that United Kingdom is about to change the
algorithm used to determine the changeover dates for British Summer Time,
to keep the EEC happy. The algorithm used so far for the UK-Eire has been
based on the Summer Time Act 1972.
However this falls over this Sunday 22nd, when the clocks change from BST
to GMT at 1am. I believe the relevant rules in /etc/zoneinfo/sources/europe
on my Digital Unix 3.2 system is
# Current rules
Rule GB-Eire 1981 max - Mar lastSun 1:00s 1:00 BST
Rule GB-Eire 1972 max - Oct Sun>=23 1:00s 0 GMT
This means that we will be changing a week late. The following information
can be gleaned from an article in a The Newsletter of the UK UNIX Users Group
by Andrew Benham (
http://web.dcs.bbk.ac.uk/ukuug/newsletter/news_at_uk44.html)
The Seventh Directive (94/21/EC) of the European Parliament and of the
Council of 30 May 1994 defined the start and end dates of summer time
throughout the EEC, (the algorithm being to start on the last Sunday in
March, and end on the last Sunday in October, always at 01:00 GMT, with
effect from 1996.
For 1995 UK-Eire the start date was 26 March: the end date
will be 22 October in the UK and Eire, and 24 September in the rest of the
EEC.
I presume a new rule can be generated as described for Sun systems in the
web pages above:
Rule GB-Eire 1996 max - Mar lastSun 1:00s 1:00 BST
Rule GB-Eire 1995 only - Oct 22 1:00s 0 GMT
Rule GB-Eire 1996 max - Oct lastSun 1:00s 0 GMT
Then a new timezone file can be generated using zic.
So my question is, am I right and will this work ? Also does the same apply
for DECstations ? If I am to fix this it will have to be done for all my
NFS clients...
Cheers,
Paul
+ Paul Collison p.collison1_at_physics.oxford.ac.uk +
| Starlink Computer Systems Manager |
| Astrophysics, Nuclear and Astrophysics Lab., tel: +44 1865 273311 |
+ Keble Road, Oxford, OX1 3RH, ENGLAND. fax: +44 1865 273418 +
Received on Fri Oct 20 1995 - 13:43:16 NZDT