30/360 German (30E/360 ISDA)

Start date: M1/D1/Y1
End date: M2/D2/Y2
Day count = (Y2-Y1)·360 + (M2-M1)·30 + (D2-D1)

Convention:
• if D1=31 then D1=30
• if D2=31 then D2=30
• if D1 is the last day of February then D1=30
• if D2 is the last day of February then D2=30

This method is used primarily for German corporate bonds. Example - Dekabank, 1.4% 30jul2021, USD.

All methods for calculating the number of days between dates can be found at Bond Calculator Guide.