Time and dates Follow the European/military conventions: dd/mm/yy , 24 hours. dd/mm/yy (e.g. “ 11/05/21 ” = “May 11 2021”) 24 hours time format (e.g. “ 20:45 ” = “ 8:45 PM ”) When writing a date in long-form, the ordinal form of the day can be implied. Wrong: June 15th June 15th, 2021 15 of June Right: June 15 June 15, 2021 15th of June Season names are always uncapitalized except when required by other grammar rules. e.g. “I got married in summer .” If in doubt, make it sound good rather than worry about being “right”.