Question

How can I add YAML current date in rmarkdown

Answer 1

In order to do so, you will have to make the date field valid in YAML by quoting the inline R expression, i.e.

date: "`r format(Sys.time(), '%d %B, %Y')`"
The parsing error will be gone, and the date will be generated in the markdown output.
Pandoc can use the value from Sys.time().

Answer 2

<$today:MM/dd/yyyy>

Answer 3

---

title: ""

output: html_document

dates: "`r Sys.time()`"

---