Document demonination units
@@ -992,6 +992,30 @@ so both fields will evaluate to the same value.
then the contract code would need to contain itself as a constant array, which would
result in an contract of infinite size.
+Ether and time units
+____________________
+
+Any decimal numeric literal constant can have a unit denomination. For example
+``10 minutes`` will evaluate to 600, i.e. the constant will be multiplied by the
+multiplier listed below. The following units are available:
+
+=========== =========================
+Unit Multiplier
+
+``seconds`` 1
+``minutes`` 60
+``hours`` 3600
+``days`` 86400
+``weeks`` 604800
+``wei`` 1
+``szabo`` 1_000_000_000_000
+``finney`` 1_000_000_000_000_000
+``ether`` 1_000_000_000_000_000_000
+=========== =========================
+
+Note that ``ether``, ``wei`` and the other Ethereum currency denominations are available when not
+compiling for Ethereum, but they will produce warnings.
+
Casting
_______
