The Tlak Calendar provides a basic calendar to explore dates; it is based in PHP and Ajax.
The calendar is released with a set style, it is plain but looks fine however you can style it whichever way you like, you just need to provide the CSS rules to apply to the different parts of the calendar and you will be all set.
You can consult the forum in it you will find the Photoshop source for the animated loading gif which you can modify to your own needs, alternatively you can add your own set of animated or non-animated images to the folder images/loading/ within the module's folder.
Front end language support: de-DE, el-GR, en-GB, es-ES, et-EE, fr-FR, in-ID, it-IT, nb-NO, nl-NL, pl-PL, pt-BR, pt-PT, ru-RU, sv-SE, tr-TR.
Back end and front end full language support: en-GB, es-ES.