Easter date calculations
Sunday, February 18, 2018
When you create a calendar, like OOoCalendar, it’s nice, if
the calendar already calculates holidays. One of the holidays, that is every year on a somewhat
different date is Easter. There are many other Christian holidays that depend on the Easter day like
40 days after Easter is Ascension Day.
Sunday, December 3, 2017
Do you know the “Olson database”? It’s the database in which all the timezones of the world
are described. The timezones of the present - and also of the past.
See the wikipedia article tz database for more information.
Big or Little
Saturday, October 7, 2017
Every number has an ending. Sometimes it’s big, sometimes it’s little.
When you are dealing with a number, that’s greater than what fits into 1 byte, you’ll need
more space to store the number. Then the order of the bytes matters. This
post is about the endianess, whether it’s big-endian or little-endian.
Providing a dual stack service behind a native ipv6 and carrier-grade NAT ISP
Monday, May 1, 2017
Suppose, you have an ISP that provides you with native ipv6 connectivity. This means, you have
been assigned a globally routeable IP version 6 address -yay!! However, this comes with a cost:
You don’t have a globally routeable IP version 4 address, not even a dynamic one. And this is
still necessary, if you want to be able to reach your service, e.g. from cell phone networks.
Creating own desktop entries for Linux Gnome3
Sunday, February 19, 2017
Assuming, you want to install the vanilla Firefox browser or Thunderbird.
And you want to have nice starter symbols in Gnome3 as favorites. Here’s how to do it: