1, clear and definite: the 24-hour clock can clearly indicate the morning and afternoon time, and avoid the confusion caused by using 12 hours. For example, "10:00" can represent 10 am, while "10:00AM" is more specific.
2. International use: The 24-hour system is more common all over the world. Different countries and regions may use different time systems, and using the 24-hour system can avoid understanding problems caused by time zones and cultural differences.
3. Avoid ambiguity: Using the 24-hour system can avoid ambiguity caused by different expressions in the morning and afternoon. For example, "6:00PM" may be understood as 6: 00am in some areas, while "18: 00pm" clearly means 6: 00pm.
4. Professionalism: As a formal invitation, wedding invitations are more professional and standardized by using the 24-hour system, which reflects the importance of detail and accuracy.