Hola Sr, Puedo ayudarle a cambiar el idioma del calendario , ya he trabajado con Date Time Picker y lo he hecho, Tengo experiencia en Html y Javascript. you can check my profile here:
https://www.freelancer.com/u/deividvasquez625?w=f
Please check my profile. I have good reviews, 4.9 star rating and good completion rate.
I am looking forward for your response. I hope you will provide me a chance to work with you.
Thank you