The document expresses frustration about the multitude of date formats and the challenges of writing regexes to parse them. It highlights various examples of date formats including ISO 8601 and others used in different systems. The author pleads for people to stop creating new date formats to alleviate the regex-writing burden.

1. Dates

2. Dates
AGGGGHHGGHG!?!?

3. Dates
AGGGGHHGGHG!?!?
- A short talk about how writing
regexes turns me into rageguy

4. Date formats

5. Date formats
• There are so many of them!

6. Date formats
•There are so many of them!
• Why do people keep inventing
them?

7. Date formats
•There are so many of them!
• Why do people keep inventing
them?
• I hate writing regexes

8. ISO8601
2012-06-28T
00:15:46Z

9. ISO8601
2012-06-28T
00:15:46+00:00

10. ISO8601
2012-06-28T
00:15:46.456
+00:00

11. /^(d{4})-(d{2})-
(d{2})T(d{2}):
(d{2}):(d{2})(?:(?:
.|,)(d+))?((?:+|-)d
d:dd)$/

12. ISO8601 is
comparatively
EASY to parse.

13. ISO8601 is
standard, there are
libraries.

14. HTTP
Mon, 20 Dec 1998
01:00:00 GMT

15. HTTP
:(

16. Apache
[27/Jun/2012:23:57:03
+0000]

17. Apache

18. ElasticSearch
[2012-06-26
02:08:26,879]

19. ElasticSearch

20. RabbitMQ
26-Jun-2012::16:18:30

21. RabbitMQ

22. MongoDB
Thu Jun 28 01:02:29

23. MongoDB

24. Syslog
Jun 28 00:17:26

25. Syslog

26. .Net ‘tick’
634763158360000000
100 ns from 1st Jan 1AD
(Except those that are from 3rd Jan)

27. .Net ‘tick’

28. MySQL
120423 12:31:04

29. MySQL

30. Please don’t make me
write more regexes?

31. STOP INVENTING
DATE FORMATS

32. Thanks!