+package org.simantics.spreadsheet.solver.formula;
+
+import java.time.LocalDate;
+import java.time.Month;
+import java.time.temporal.ChronoUnit;
+import java.time.temporal.Temporal;
+
+import org.simantics.spreadsheet.solver.formula.parser.ast.AstArgList;
+
+public class TodayFormulaFunction implements CellFormulaFunction<Long> {
+
+ private Temporal baseline = LocalDate.of(1899, Month.DECEMBER, 30);
+
+ @Override
+ public Long evaluate(CellValueVisitor visitor, AstArgList args) {
+ return Long.valueOf(ChronoUnit.DAYS.between(baseline, LocalDate.now()));
+ }
+
+}