When entering two "between" dates, FH is quite restrictive on what it accepts.
- btw 1914 and 1918 is accepted
between 1914 and 1918 is accepted but is immediately displayed as btw 1914 and 1918
btwn is rejected as an "unknown date"
& is rejected as an "unknown date"
How they are displayed is of no real concern to me, the current "btw 1914 and 1918" is fine, but on the basis of saving screen and paper space, I'd have no issue if it was changed to "btw 1914 & 1918".