This is a custom glibc locale.

Highlights

• English language
• Metric units
• ISO 8601 date and time formats
• Weeks start on Monday
• ISO A4 as paper format
• E.123 notation for telephone numbers
• Full stop (U+002E) as decimal separator
• Narrow no‐break space (U+202F) as thousands separator
• Euro sign (U+20AC) as currency symbol