In Spanish, you say “seis en punto” for six o’clock. The word “seis” means six, and “en punto” translates to exactly or on the dot, indicating the precise time. So when you want to express that it’s exactly six o’clock, you use this phrase.
If you’re referring to the time in a more conversational context, you could simply say “seis” when someone asks you what time it is. However, for clarity and formality, especially in written communication, using “seis en punto” is recommended.