Excel to Hotmail ICS Creator

I need an .xlsx file converted into an ICS file for importing into Hotmail Calendar. The Excel file contains availability information.

Requirements:
- Convert .xlsx file to .ics format
- Include: Date and time, Location, Description
- Ensure compatibility with Hotmail Calendar

Ideal Skills:
- Experience with calendar formats and file conversion
- Proficiency in handling .xlsx and .ics file types
- Attention to detail to ensure accuracy of information