# ISO 8601 Basic Format **URL:** \ **Category:** Logstash\ **Created:** [June 2, 2020, 11:26am UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323 "2020-06-02T11:26:00Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![yakimant](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yakimant/32/69565_2.png) [@yakimant](https://discuss.elastic.co/u/yakimant)\ **Post date:** [June 2, 2020, 11:26am UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323/1 "2020-06-02T11:26:00Z")
Hi everyone, I was reading ISO 8601 wiki: > **[ISO 8601](https://en.wikipedia.org/wiki/ISO_8601)** > > ISO 8601 Data elements and interchange formats – Information interchange – Representation of dates and times is an international standard covering the exchange of date- and time-related data. It was issued by the International Organization for Standardization (ISO) and was first published in 1988. The purpose of this standard is to provide an unambiguous and well-defined method of representing dates and times, so as to avoid misinterpretation of numeric representations of dates and times, particu... And found out: "Representations can be done in one of two formats – a basic format with a minimal number of separators or an extended format with separators added to enhance human readability." But if I use ISO8601 date filter for the following, I get a "\_dateparsefailure": "20200602T112500+0000" For me it looks exactly as basic format of ISO8601. I didn't find any discussion on this topic in the internet, so decided to start one here. ---
**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\ **Post date:** [June 2, 2020, 1:45pm UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323/2 "2020-06-02T13:45:19Z")
My reading is that the [code](https://github.com/logstash-plugins/logstash-filter-date/blob/master/src/main/java/org/logstash/filters/parser/CasualISO8601Parser.java#L39) (and [here](https://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTimeParser--)) requires separators. You cannot just smush the year, month, and day together. ---
**Author:** ![yakimant](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yakimant/32/69565_2.png) [@yakimant](https://discuss.elastic.co/u/yakimant)\ **Post date:** [June 3, 2020, 8:59am UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323/3 "2020-06-03T08:59:57Z")
Hi @Badger, I'm quite new to ELK and ISO8601, that's why I decided to read wikipedia. Wikipedia says - there are 2 formats - basic and extended. Basic allows to omit any punctuation. I didn't generate this date string myself. It came from one of commercial app logs. Looks suspiciously kind of ISO8601. ---
**Author:** ![yakimant](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yakimant/32/69565_2.png) [@yakimant](https://discuss.elastic.co/u/yakimant)\ **Post date:** [June 3, 2020, 9:05am UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323/4 "2020-06-03T09:05:54Z")
Started a topic in GitHub too: > > > Hi guys, > I want to duplicate my question here: > I was reading ISO 8601 wiki: > And found out: > "Representations can be done in one of... ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 1, 2020, 9:05am UTC](https://discuss.elastic.co/t/iso-8601-basic-format/235323/5 "2020-07-01T09:05:59Z")
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