---
title: References
description: See the SpEL Language Reference.
component: pingone
page_id: pingone:pingone_expression_language:p1_expressionlang_references
canonical_url: https://docs.pingidentity.com/pingone/pingone_expression_language/p1_expressionlang_references.html
revdate: May 3, 2024
section_ids:
  spring-expression-language: Spring Expression Language
  datetimeformatter-patterns: DateTimeFormatter patterns
---

# References

## Spring Expression Language

See the [SpEL Language Reference](https://docs.spring.io/spring-framework/docs/5.1.x/spring-framework-reference/core.html#expressions-language-ref).

## DateTimeFormatter patterns

The following common pattern symbols are extracted from Java documentation. For a complete list, see [Class DateTimeFormatter](https://docs.oracle.com/javase/8/docs/api/java/time/format/DateTimeFormatter.html).

| Symbol | Meaning                    | Examples                  |
| ------ | -------------------------- | ------------------------- |
| `y`    | year-of-era                | `2004`; `04`              |
| `D`    | day-of-year                | `189`                     |
| `M`    | month-of-year              | `07`; `Jul`; `July`; `J`  |
| `d`    | day-of-month               | `10`                      |
| `q`    | quarter-of-year            | `03`; `Q3`; `3rd quarter` |
| `W`    | week-of-month              | `4`                       |
| `E`    | day-of-week                | `Tue`; `Tuesday`; `T`     |
| `a`    | am-pm-of-day               | `PM`                      |
| `h`    | clock-hour-of-am-pm (1-12) | `12`                      |
| `K`    | hour-of-am-pm (0-11)       | `0`                       |
| `k`    | clock-hour-of-am-pm (1-24) | `1`                       |
| `H`    | hour-of-day (0-23)         | `0`                       |
| `m`    | minute-of-hour             | `30`                      |
| `s`    | second-of-minute           | `55`                      |