> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agrihub360.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Key Dates

> The closed periods, the heap moves and the hedge-cutting season, per field, on Today and by email.

How to: [Get the Email and the Push Before a Date](/how-do-i/today/get-the-email-and-the-push-before-a-date).

## What It Tells You

A **key date** is a day the rules fix for a field. The closed period for manufactured nitrogen starts and ends; the closed period for high readily available N manure starts and ends, earlier on sandy and shallow soils; a temporary field heap must move within twelve months; the hedge-cutting closed season opens and closes. The Key Dates page lists them by month across the farm, each with the field and the regulation, and the overdue ones in red.

## How It Works

The dates are derived from the farm's nation, each field's soil and crop, the heaps on the map and the SFI agreement where there is one. The SFI annual declaration is due by the end of the agreement year, and its window opens two months before.

| Date                                       | Applies to                                        | From                                          |
| ------------------------------------------ | ------------------------------------------------- | --------------------------------------------- |
| Manufactured N closed period start and end | Every field, grass and tillage on different dates | The NVZ rules for the nation                  |
| Organic N closed period start and end      | Every field, earlier on sandy or shallow soils    | The NVZ rules for the nation                  |
| Field heap move by                         | Each temporary field heap on the map              | Twelve months from when it was placed         |
| Hedge-cutting closed season                | The farm                                          | Cross compliance and the SFI hedgerow actions |
| SFI declaration                            | The agreement                                     | The agreement's own year                      |

A key date within reach is a decision on [Today](/features/decision-windows/todays-decisions), in the legal band, ahead of every window. A weekly email lists the month's dates. Each date can be added to the phone's calendar.