Share your pictures of revelry around the world

As part of a new series we’ve called the Readers’ picture desk, our own picture editors are going to set a topical theme and will be choosing the best of your photos to publish in an online gallery every two weeks.

This week’s theme takes in Mardi Gras and other celebrations that occur around the world this month and takes inspiration from how those celebrating are often described – as “revellers”.

Our picture editors will also share with you what they admire about the images that have been selected as well as highlight some of the skills necessary to develop as a photographer – and will look forward to seeing your progress along the way. You have until Thursday 9 March to upload your images. We will publish the gallery for this assignment on Monday 13 March and set out next assignment on the same day.

What makes a good photograph?

Click here to see some advice on this from Fiona Shields, the Guardian’s head of photography. Think carefully about why you are uploading your shot, and tell us a little about it in the caption, for example where it was taken and when, and why you thought the subject would make for a successful image.

How to upload your photographs

To upload your images via GuardianWitness click the blue “contribute” buttons on this article. Please upload the highest resolution image you have – this will help us display the photograph in our gallery and will also allow our picture editors to consider featuring some of the best images in print.

• GuardianWitness is the home of readers’ content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be reviewed prior to publication.

• This assignment is aimed at amateur photographers from around the world.