Unix Epoch and PHP's calendar system
I just saw a commit flying past as a response to PHP bug #50155. While right now it is proper to define the Unix Epoch at "1970-01-01 00:00:00 UTC", UTC wasn't actually defined until 1972. So it would be more correct to define the Unix Epoch as "the number of seconds elapsed since midnight proleptic Coordinated Universal Time (UTC) of January 1, 1970, not counting leap seconds." (from Wikipedia). What the bit "not counting leap seconds" means, I've already explained before in Leap Seconds and What To Do With Them.
Similarly, PHP's internal calendar is the ISO 8601 calendar. This is a modification of the proleptic Gregorian calendar. The Gregorian calendar implements the current set of leap years every 4 years, but not every 100 years, but again every 400 years (to get to an average year length of 365.2425 days). Obviously this calendar is only in use since 1582 (some countries adopted it as late as the 1900s), so using days like 1066-10-14 in the Gregorian calendar makes little sense because that calendar didn't exist back then. Now, PHP's ISO 8601-based calendar even modifies the Gregorian calendar by including the year 0. The Gregorian calendar goes straight from -1 to 1 which is a pain to do proper date calculations with. Therefore the ISO 8601 calendar uses Astronomical year numbering.
Life Line
Updated a restaurant
I walked 4.2km in 1h20m37s
Updated a restaurant
I walked 2.0km in 21m39s
On the lookout.
A Common Reed Warbler perched on a reed branch.
#photography #Birds #BirdPhotogaphy #nature
I walked 1.7km in 29m22s
@beasts Is your ns1 doing OK? I am getting warning from monitoring that it is timing out and having different results than ns2.
Updated a restaurant
I walked 8.5km in 1h50m50s
I consider myself a decent photographer, but then you find out about the likes of Angel Fux (https://www.angelfux.com/portfolio), and I would like to crawl into a hole.
Better alignment from multiple GPS tracks for QE II Garden (and removed duplicated node)
After two busy days doing elections stuff, I spent yesterday looking at birds, in a nature reserve to relax and recharge.
I saw some cracking birds, with these being my favourite shots.
#BirdPhotography #photography #BirdsOfMastodon #Nature #London
I walked 8.0km in 1h26m01s
Updated a restaurant
Updated 3 bird_hides; Confirmed 2 informations and a toilet
I walked 7.0km in 3h10m47s
This map was mostly red yesterday.
I'm glad we managed to win all the wards we've targeted.
However, no overall control, and two parties with the same amount of seats in second place.
I walked 2.2km in 41m46s
I walked 1.9km in 19m17s
I've spend most of my time outside polling telling today, taking down poll card numbers so we don't need to chase people up to go vote.
I have made several observations:
Updated a restaurant
I walked 12.1km in 2h3m04s
I walked 1.1km in 9m46s
I walked 1.2km in 10m31s
Updated a waste_basket
Shortlink
This article has a short URL available: https://drck.me/ueapcs-7aw