Ask HN: What seems longer... "One Month" or "30 days"?

I think 'A Month' sounds more Bold and because of this it seems longer than '30 Days'.

This is like how shopping goes, majority of products are priced 1 penny/cent under the round-up figure for example:

£14.99 instead of £15.00 - The lower number '14' making it sound like its less.

Good question by the way too!

From a marketing point of view it depends upon the context: For example "act now and we'll give you the first month free" sounds good yet "and if you don't like our product we'll give you up to thirty days to return it" sounds good in another context.

It depends if this is based on working days or not. A month of working days is usually on average only 20 actual days.

30 days is perceived as longer. That's why "30 days money back guarantee" is standard phrasing.

It's all in the context. "A whole month", "Every day for thirty days", and so on.

Last month, 30 days seemed longer.

This month, a month seems longer.

Next month, they'll seem equal :-)