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 2 house buildings
Updated 2 estate_agent offices
I walked 8.2km in 1h37m13s
I'm excited about the PHP UK Conference on Friday!
I am speaking on @Xdebug, but the whole programme looks great:
https://www.phpconference.co.uk/scheduleTickets are still available, and you'll get 10% off with the code "PHPUK26".
Will I see you there?
RE: https://en.osm.town/@richardf/116086276801420468
For the UK #trains fans under us.
Missed a building outline
Added the Old Dairy House and Aston Mews buildings
More accurate Canterbury Road mapping
I walked 7.0km in 1h37m07s
I walked 8.4km in 1h21m36s
Put new open stretch of Canterbury Road on map
Created a bench and a crossing
Created 2 benches and a crossing; Updated 5 cushions, a post_box, and a crossing
Created a crossing; Updated a cushion
I walked 9.9km in 1h46m54s
If you were wondering whether the www.php.net & downloads.php.net services weren't responding very well in the last 6 hours — thousands of requests/sec to https://www.php.net/ 's root.
The server's load was 720, didn't die, but CDN connections to it timed out.
Now there is a caching strategy in place for a selected set of resources.
Updated a bench
Created 3 benches; Updated 10 benches
Updated a bench
Updated a bus_stop
Created a bench and a waste_basket; Updated 6 bus_stops and a crossing
Created 2 waste_baskets and a recycling; Updated 2 bicycle_parkings and a recycling
Updated a fast_food, a funeral_directors shop, and 2 other objects; Confirmed a fast_food and a hairdresser shop
Created an information; Updated 3 benches and 2 waste_baskets
Updated 2 benches and a waste_basket
Shortlink
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