I have a problem concerning times of the day in English. Am I doing it right? I'm particularly interested in the bolded ones (midnight/noon/midday). Do they require any prepositions? Would it be correct to write and say, for example: It's twelve o'clock at midnight? When it comes to 18:00 – is "It's six o'clock in the evening" also correct? Take a look at the sentences after OR. Are they correct? Is everything correct?