etl/docs/chrono/last_spec.md
2026-05-19 12:12:14 +01:00

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---
title: "last_spec"
---
{{< callout type="info">}}
Header: `chrono.h`
From: `20.41.0`
Similar to: [std::chrono::last_spec](https://en.cppreference.com/w/cpp/chrono/last_spec.html)
{{< /callout >}}
`last_spec` is a tag type that is used in conjunction with other calendar types to indicate the last thing in a sequence.
```cpp
struct last_spec
{
explicit last_spec() = default;
};
inline constexpr last_spec last{};
```
**Example**
`2025_y/March/last` for last day of March 2025 i.e. 2025-03-31