Change date with button

[Aly IGERY]

Hello everyone…

I've searched the forum but haven't found anything helpful.

We have two requests…

1. In our library named "ITT" (IsTimeTracker), we have two date fields with start and end dates, "Start" and "End", in the format "dd.MM.YYYY, hh:mm:ss". We want to use a button to increment only the day, e.g., today being the 26th, would only be 27th when the button is clicked. Does anyone know the corresponding code?

2. …and there are also some fields that we would like to be visible only when creating or editing an entry, and invisible after saving. Is this possible?

[Mmm]

Шаблон с примером в каталоге шаблонов:

https://mementodb.com/t/4745423896182784

пятница, 27 марта 2026 г. в 13:52:03 UTC+3, warna...@gmail.com:

[Aly IGERY]

It works. Thank you very much. 👏👏👏

[David Gilmore]

Your second question is separate from the first.  May I suggest you create a separate thread for that question, so that others can easily find it when searching for this answer.

I do have a solution for you, which I use in most of my libraries, and which I will share in the new thread.

For the first question, there a many ways to accomplish this. If you want to do this in simple Javascript, the following works:

var e = entry();

var dt = new Date(e.field("DateField"));

dt.setDate(dt.getDate() + 1);

e.set("DateField", dt.getTime());

The above still works when at the end of the month or year.

 One advantage with using Javascript is that it adds flexibility when/if your requirements change.

[Aly IGERY]

Hi David,

Thank you for your attention.

I've solved question 2.

Your code works well. I can even use it for two date fields.

Thanks again! 👍👍👍

[Aly IGERY]

I copied and edited part of the code to change two dates simultaneously. Now I want to add a second button below to change the date by one month. How do I need to modify the code?

Have a nice day!

[Mmm]

Например, с помощью 

moment().add(1, 'M');

Источник:

https://momentjs.com/docs/#/manipulating/add/

воскресенье, 29 марта 2026 г. в 10:52:35 UTC+3, warna...@gmail.com:

[Aly IGERY]

Thanks "Mmm". That's great.

But I'm confused, where am I supposed to insert your code? (I mean at the top of "David's" code)

[Mmm]

Про Date():

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

Чтение и установку дня нужно заменить на чтение и установку месяца...

воскресенье, 29 марта 2026 г. в 11:28:07 UTC+3, warna...@gmail.com:

[Aly IGERY]

Это гораздо полезнее и интереснее.

Хорошего дня… 👍👍👍

[David Gilmore]

var e = entry();

var dt = new Date(e.field("DateField"));

dt.setMonth(dt.getMonth() + 1);

e.set("DateField", dt.getTime());

As I said, Javascript flexibility. If you want to learn more about native Javascript date functions, search for "javascript date object".

[Aly IGERY]

Very nice, David.

Thank you and have a nice day. 👍👍👍