> For the complete documentation index, see [llms.txt](https://help.taglo.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.taglo.io/assumptions/assumptions-wizard/assumption-dates-step.md).

# Assumption Dates Step

## Overview

<figure><img src="/files/Lzxa4Mvw8ZzrLTILRrQ4" alt=""><figcaption><p>The Dates step of the Assumptions wizard</p></figcaption></figure>

If creating new Assumptions manually, you will need to specify a date range for the Assumptions. By default the date range is set to the [**Timings**](/models/home-tab/creating-a-model/timings.md) of the Model (e.g. one Assumption per period).

If the [**Unit**](/units/introduction-to-units.md) for your Assumptions is `Constant` (i.e. no part of the Unit varies with time), the Dates step will not be shown.

{% hint style="info" %}
The Dates step will only be shown when creating new Assumptions. If you are editing multiple Assumptions, the time range for the Assumptions will be automatically detected.
{% endhint %}

## Entry type&#x20;

Dates can be entered with an **automatically generated** series of dates, or a **manually entered** list of dates.

Instructions for each of these options are below.

## Date entry

### Automatically generated

#### Start Date / End Date / Number of intervals

Enter the Start date, number of intervals, and End date for the series. The format of date entry depends on the period type of the Model (see details [**here**](/models/home-tab/creating-a-model/timings.md#start-end-date-text-formats)).

Editing any two of these three inputs will automatically update the third.

#### Intervals between dates

By default, assumptions will be generated for each period between the start date and end date. You can opt to change this interval: e.g., to generate an assumption for every fourth period, you would enter 4.

### Manual batch entry

If you select **Manual batch entry**, you will be presented with a text box in which you can type/paste a list of dates, which must be in the correct format, as shown in the example screenshot below.

You must include a line break in between each date.

<figure><img src="/files/AJ9p9FEPsbrLErBQcQbF" alt="Screenshot of the manual batch entry step used to enter multiple dates for a time series in the Assumptions wizards"><figcaption><p>Manual batch entry of dates in the Assumptions wizard</p></figcaption></figure>


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