In Ireland, the date is written in the order "day month year", with the separator as a slash, dot, hyphen, or just left blank.
Examples:
31 December 1992 is also used, or in Irish, 31 Nollaig 1992. When dates are spoken, they are generally given in "day month year" order: "the 31st of December 1992".
Time
24-hour is the dominant format. The 24-hour notation is written "04:05".
Examples:
In addition to this, the system of saying the exact time (e.g., 14:55 is said as "fourteen fifty-five") is also widely used. People in Ireland commonly use both systems of time.
References
Date and time notation in Ireland Wikipedia(Text) CC BY-SA