Date Formatting

45885928-86cf-4aa9-a5db-dda63de1e395

Date Formatting

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Updated5/1/2026

PageRank0.0001

Effectiveness0.000

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21 linked nodes

PERTAIN_TORootCause

The time is always 19:00:00. — inside the Java code of my API. Outcome: Check your server's timezone. Also, it could be from the formatting you're doing at the backend.

PERTAIN_TOProblem

once I attempt to use the datepicker. Outcome: when I call to the date value to display it inside the app, it is returning a date value of `2025-03-31T00:00:00.000+00:00`.

PERTAIN_TOSolution

Check your server's timezone. — the formatting you're doing at the backend. Tension: it could be from the formatting you're doing at the backend. Outcome: make sure it's not formatting based on a specific time and timezone.

PERTAIN_TOProblem

it keeps looping and resetting back to the default date. — User manually updates renew date. Tension: API Response -> setPaymentData(data) -> User manually updates renew date -> Reset back to old value. Outcome: Maybe adding case where `data.results.paymentSummary.renewOn` is not null and add logic there will solve the problem?

PERTAIN_TOSolution

Maybe adding case where `data.results.paymentSummary.renewOn` is not null — `data.results.paymentSummary.startOn` individually. Tension: I think your code is mixing between `snake_case` and `camelCase` for property names.

PERTAIN_TOProblem

How can I truncate a temporal value to tenths of a second? — In Java, I can easily truncate a temporal value (`LocalTime`, `ZonedDateTime`, etc.). Tension: I was hoping to avoid that if possible. Outcome: I can certainly roll my own "tenths of second" `TemporalUnit` and truncate to that.

PERTAIN_TOSolution

LocalTime inMillis = time.truncatedTo(ChronoUnit.MILLIS); — LocalTime time = LocalTime.now();. Tension: you want something briefer. Outcome: LocalTime inTenths = inMillis.with(ChronoField.MILLI_OF_SECOND, inMillis.get(ChronoField.MILLI_OF_SECOND) / 100 * 100);.

PERTAIN_TORootCause

Duration.parse(). Tension: years or months have different lengths, so it is not precise to use them for durations.

PERTAIN_TOProblem

it fails with "Text cannot be parsed to a Duration" — I am trying to parse durationString= P10YT10M using java.time.Duration.parse() method. Tension: it cannot parse durationStrings similar to P5YT30M, P5Y8M4W3D. Outcome: it's working for durationStrings like PT5M.

PERTAIN_TOSolution

java.time.Duration.parse().

PERTAIN_TOSolution

See Period for the date-based equivalent to this class. — This class models a quantity or amount of time in terms of seconds and nanoseconds. Outcome: PT5M, but it cannot parse durationStrings similar to P5YT30M, P5Y8M4W3D.

PERTAIN_TOProblem

Unable to parse the date: 2025-03-09T02:37:51.742. Tension: All the dates are working before and after that one hour.

PERTAIN_TOSolution

parse as a `LocalDateTime`. — Your string input represents a date with time of day, but lacks the context of a time zone or offset from UTC. Tension: Without a zone or offset, we have no way of knowing if this is 2 AM in Tokyo Japan, 2 AM in Toulouse France, or 2 AM in Toledo Ohio US. Outcome: If you are certain your input was meant to represent a moment as seen in a particular time zone, specify that zone to generate a `ZonedDateTime`.

PERTAIN_TOProblem

TimerTask does not run at the desired times

PERTAIN_TOSolution

Use ScheduledExecutorService with ZonedDateTime and Duration to schedule the next execution

PERTAIN_TOProblem

I need to retrieve some data from the db and I need to check if the given date matches the one in the table — I am converting the `String` I get from the front end app, transform it in a `java.util.Date` and then in a `LocalDateTime`. Tension: Is this approach correct, or am i missing something? Outcome: Format of the string from the front end and also stored in db: 2025-01-29 15:09:57.475000.

PERTAIN_TOProblem

datetime(3) values lose trailing .000 fractional seconds when read back, breaking parsing

PERTAIN_TOSolution

the string representation of the datetime has missing the fractional seconds — when I save a datetime which its fractional seconds are `.000`. Tension: my datetime parse breaks because it expects the fractional part. Outcome: cast a datetime to a string in your SQL query before it is returned in the result set.

PERTAIN_TOSolution

cast(dt as char) — select id, dt, cast(dt as char) from test.t. Tension: the non-cast `dt` column truncates trailing zeroes. Outcome: the column preserves trailing zeroes when I cast it to CHAR.

PERTAIN_TOProblem

a time zone abbreviation such as `PST` — whether the user is in the Philippines, US, Canada, etc. Tension: both provide an exhaustive list and don't give any guidance on which to pick. Outcome: a lot closer than having to guess when we get an ambiguous time zone as input.

PERTAIN_TOSolution

you need to use `ZoneId.of(String, Map)` method — To be able to use the ambiguous short IDs. Tension: the map provides the mapping between unsupported names and a supported name. Outcome: you'll need to provide said mapping yourself with a custom `Map`.

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