One Day font here refers to the font used in the title of One Day, which is a 2011 film based on the novel of the same name by David Nicholls. In the film, two college students spend the night together on the night of their graduation and agree to meet on the same date in the following years to see where they are in their lives.
The font used for the One Day title in the film poster is very similar to Adobe Garamond Regular. The font is a commercial one and you can view more details about it here.
Download Garamond Font
The Garamond font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.