This is today's date on the regular (Gregorian) calendar:
Thursday
20
February
2025
Friday
21
February
2025
Saturday
22
February
2025
Sunday
23
February
2025
Monday
24
February
2025
Today
Tuesday
25
February
2025
Wednesday
26
February
2025
Thursday
27
February
2025
Friday
28
February
2025
Saturday
1
March
2025
Sunday
2
March
2025
…and this is the same date on the World calendar:
Tuesday
21
February
2025
Wednesday
22
February
2025
Thursday
23
February
2025
Friday
24
February
2025
Saturday
25
February
2025
Today
Sunday
26
February
2025
Monday
27
February
2025
Tuesday
28
February
2025
Wednesday
29
February
2025
Thursday
30
February
2025
Friday
1
March
2025
…and on the International fixed calendar:
Tuesday
24
February
2025
Wednesday
25
February
2025
Thursday
26
February
2025
Friday
27
February
2025
Saturday
28
February
2025
Today
Sunday
1
March
2025
Monday
2
March
2025
Tuesday
3
March
2025
Wednesday
4
March
2025
Thursday
5
March
2025
Friday
6
March
2025
What about a decimal calendar?
Decimal calendars have been attempted, but none have gathered much interest. Some had 10 months of ~36 days, some kept the 12 months, but divided them into 3 weeks of 10 days where the 5 or 6 extra days (to match a solar year) happen after the last month.