Currently, the python-docx library's comment functionality does not support specifying timezone for timestamp display. All timestamps are displayed in UTC timezone, which causes confusion for users in different time zones.

Current Behavior

• When adding comments to Word documents using python-docx
• All timestamps are displayed in UTC timezone
• No option to specify or customize the timezone
• Users in different time zones see incorrect local times

Expected Behavior

• Support timezone specification when creating comments
• Allow customization of timestamp timezone
• Display timestamps in the specified timezone
• Provide backward compatibility for existing functionality