Vinícius Souza viniciusjssouza

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

	#### JSON Rules

	#2018-08-22T11:05:02.637Z 4d8b3785-079a-5f47-9b09-647242079aed {"level": "INFO", "message": "that's an interesting message", "user": "john"}
	log_json_rule %{date("yyyy-MM-dd'T'HH:mm:ss.SSSZ"):timestamp}\s+%{notSpace:lambda.request_id}\s+%{regex("\\{.*\\}")::json}

	#### Plain Text Rules

	#2018-08-22T11:05:02.637Z 4d8b3785-079a-5f47-9b09-647242079aed INFO: that's an interesting message
	log_level_msg_rule %{date("yyyy-MM-dd'T'HH:mm:ss.SSSZ"):timestamp}\s+%{notSpace:lambda.request_id}\s+%{regex("/(?i)ERROR\|WARN\|INFO\|DEBUG\|TRACE/"):level}:?\s+%{data:message}