This field allows the day-of-quarter value to be queried and set. The day-of-quarter has values from 1 to 90 in Q1 of a standard year, from 1 to 91 in Q1 of a leap year, from 1 to 91 in Q2 and from 1 to 92 in Q3 and Q4.

The day-of-quarter can only be calculated if the day-of-year, month-of-year and year are available.

When setting this field, the value is allowed to be partially lenient, taking any value from 1 to 92. If the quarter has less than 92 days, then day 92, and potentially day 91, is in the following quarter.

In the resolving phase of parsing, a date can be created from a year, quarter-of-year and day-of-quarter.

In strict mode, all three fields are validated against their range of valid values. The day-of-quarter field is validated from 1 to 90, 91 or 92 depending on the year and quarter.

In smart mode, all three fields are validated against their range of valid values. The day-of-quarter field is validated between 1 and 92, ignoring the actual range based on the year and quarter. If the day-of-quarter exceeds the actual range by one day, then the resulting date is one day later. If the day-of-quarter exceeds the actual range by two days, then the resulting date is two days later.

In lenient mode, only the year is validated against the range of valid values. The resulting date is calculated equivalent to the following three stage approach. First, create a date on the first of January in the requested year. Then take the quarter-of-year, subtract one, and add the amount in quarters to the date. Finally, take the day-of-quarter, subtract one, and add the amount in days to the date.

This unit is an immutable and thread-safe singleton.

This field allows the quarter-of-year value to be queried and set. The quarter-of-year has values from 1 to 4.

The quarter-of-year can only be calculated if the month-of-year is available.

In the resolving phase of parsing, a date can be created from a year, quarter-of-year and day-of-quarter. See DAY_OF_QUARTER for details.

This unit is an immutable and thread-safe singleton.

This field allows the week of the week-based-year value to be queried and set. The week-of-week-based-year has values from 1 to 52, or 53 if the week-based-year has 53 weeks.

In the resolving phase of parsing, a date can be created from a week-based-year, week-of-week-based-year and day-of-week.

In strict mode, all three fields are validated against their range of valid values. The week-of-week-based-year field is validated from 1 to 52 or 53 depending on the week-based-year.

In smart mode, all three fields are validated against their range of valid values. The week-of-week-based-year field is validated between 1 and 53, ignoring the week-based-year. If the week-of-week-based-year is 53, but the week-based-year only has 52 weeks, then the resulting date is in week 1 of the following week-based-year.

In lenient mode, only the week-based-year is validated against the range of valid values. If the day-of-week is outside the range 1 to 7, then the resulting date is adjusted by a suitable number of weeks to reduce the day-of-week to the range 1 to 7. If the week-of-week-based-year value is outside the range 1 to 52, then any excess weeks are added or subtracted from the resulting date.

This unit is an immutable and thread-safe singleton.

This field allows the week-based-year value to be queried and set.

The field has a range that matches LocalDate.MAX and LocalDate.MIN.

In the resolving phase of parsing, a date can be created from a week-based-year, week-of-week-based-year and day-of-week. See WEEK_OF_WEEK_BASED_YEAR for details.

This unit is an immutable and thread-safe singleton.

This allows a number of week-based-years to be added to, or subtracted from, a date. The unit is equal to either 52 or 53 weeks. The estimated duration of a week-based-year is the same as that of a standard ISO year at 365.2425 Days.

The rules for addition add the number of week-based-years to the existing value for the week-based-year field. If the resulting week-based-year only has 52 weeks, then the date will be in week 1 of the following week-based-year.

This unit is an immutable and thread-safe singleton.

This unit is an immutable and thread-safe singleton.