[GH-ISSUE #1459] Set date format in Logger #616

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opened 2026-03-04 02:16:26 +03:00 by kerem · 4 comments

kerem commented

2026-03-04 02:16:26 +03:00

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Originally created by @delrio-design on GitHub (May 5, 2020).
Original GitHub issue: https://github.com/Seldaek/monolog/issues/1459

Some background: I am using Fluent Bit as a log forwarder for a containerized PHP application with Monolog, and want to standardize date formats across my log streams.

Some formatters, such as LineFormatter and NormalizeFormatter allow this already. I am using JsonFormatter for structured logs, it inherits from NormalizeFormatter, but I don't believe I can set the date format without subclassing it and overriding the normalize method myself. I would like to be able to set the date format globally or consistently per formatter. Given that some streams require certain date formats for ingestion by third party services, it would be nice if each step from logger to handler to stream inherited the default or global date format unless explicitly set.

Originally created by @delrio-design on GitHub (May 5, 2020). Original GitHub issue: https://github.com/Seldaek/monolog/issues/1459 Some background: I am using Fluent Bit as a log forwarder for a containerized PHP application with Monolog, and want to standardize date formats across my log streams. Some formatters, such as LineFormatter and NormalizeFormatter allow this already. I am using JsonFormatter for structured logs, it inherits from NormalizeFormatter, but I don't believe I can set the date format without subclassing it and overriding the normalize method myself. I would like to be able to set the date format globally or consistently per formatter. Given that some streams require certain date formats for ingestion by third party services, it would be nice if each step from logger to handler to stream inherited the default or global date format unless explicitly set.

kerem

2026-03-04 02:16:26 +03:00

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kerem commented

2026-03-04 02:16:27 +03:00

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@Seldaek commented on GitHub (May 11, 2020):

Indeed JsonFormatter relies on jsonSerialize's implementation on Monolog\DateTimeImmutable.

I think fixing it to allow choosing a date format sounds possible and reasonable, but I am not sure about adding a default global date format option, that sounds like it's going to be a mess to handle.

@Seldaek commented on GitHub (May 11, 2020): Indeed JsonFormatter relies on jsonSerialize's implementation on `Monolog\DateTimeImmutable`. I think fixing it to allow choosing a date format sounds possible and reasonable, but I am not sure about adding a default global date format option, that sounds like it's going to be a mess to handle.

kerem commented

2026-03-04 02:16:27 +03:00

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@delrio-design commented on GitHub (May 18, 2020):

Indeed JsonFormatter relies on jsonSerialize's implementation on Monolog\DateTimeImmutable.

I think fixing it to allow choosing a date format sounds possible and reasonable, but I am not sure about adding a default global date format option, that sounds like it's going to be a mess to handle.

Thanks for the consideration! You're right about the global format, that's a broad request.

@delrio-design commented on GitHub (May 18, 2020): > Indeed JsonFormatter relies on jsonSerialize's implementation on `Monolog\DateTimeImmutable`. > > I think fixing it to allow choosing a date format sounds possible and reasonable, but I am not sure about adding a default global date format option, that sounds like it's going to be a mess to handle. Thanks for the consideration! You're right about the global format, that's a broad request.

kerem commented

2026-03-04 02:16:27 +03:00

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@Seldaek commented on GitHub (May 21, 2020):

If you feel like sending a PR for adding this to JsonFormatter please do :)

@Seldaek commented on GitHub (May 21, 2020): If you feel like sending a PR for adding this to JsonFormatter please do :)

kerem commented

2026-03-04 02:16:28 +03:00

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@Shiva-Kandagatla commented on GitHub (Sep 5, 2020):

I'm also stuck on the exact same problem. @delrio-design Can you please explain a bit more how you solved it.

@Shiva-Kandagatla commented on GitHub (Sep 5, 2020): I'm also stuck on the exact same problem. @delrio-design Can you please explain a bit more how you solved it.

kerem referenced this issue

2026-03-04 02:16:33 +03:00

[GH-ISSUE #1495] JsonFormatter fails sometimes #631

kerem referenced this issue

2026-03-04 03:08:59 +03:00

[PR #683] [MERGED] Attempt to recover from json encoding errors #1296