> ## Documentation Index
> Fetch the complete documentation index at: https://docs.beaconcha.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Epoch & Time Zone Conversion

> Convert between Ethereum epochs, timestamps, and local time zones for rewards calculations

## Overview

The beaconcha.in API provides some data indexed by epoch. To better understand the relationship between time and epochs, you can use the [Slot Finder](https://beaconcha.in/slots/finder) tool and the time constants provided below.

<Warning>
  We are developing endpoints designed to streamline the retrieval of summarized data for user-defined periods. Manually summing up rewards epoch-by-epoch doesn't scale well for many validators over long timeframes.
</Warning>

***

## Ethereum Time Constants

| Constant          | Value        | Description                    |
| ----------------- | ------------ | ------------------------------ |
| Genesis Timestamp | `1606824023` | December 1, 2020, 12:00:23 UTC |
| Seconds per Slot  | `12`         | Time between slots             |
| Slots per Epoch   | `32`         | Slots in one epoch             |
| Seconds per Epoch | `384`        | 32 × 12 seconds                |
| Epochs per Day    | `225`        | 86,400 / 384                   |
| Epochs per Year   | `~82,125`    | 365 × 225                      |

***

## Related Resources

* [Introduction](/use-cases/rewards-introduction) — Overview and endpoint comparison
* [Custom Range Rewards](/use-cases/rewards-custom-range) — Calculate rewards for any date range
* [Tax Year Calculations](/use-cases/rewards-tax-calculations) — Calculate rewards for specific tax years