This is an important issue that is often misunderstood. The dates and deadlines related for lien and bond claims are based off the month and year in which the work was actually performed. The invoice date and company accounting methods are irrelevant for these claims.
The important issues are when the work was actually performed and the value of the work for each individual month.
A helpful example? Assume that a contractor completed a three-month painting project that lasted from January to March. The contractor would need to separately identify the value of the work performed for January, February, and March. It would not matter if only one invoice was issued at the end of the project.
The deadlines will vary depending on the type of document and the type of contractor or supplier. General deadlines can be found in the chart below.

FOR CLAIMS RESULTING FROM A CONTRACT SIGNED BEFORE DECEMBER 31^ST, 2021
IF THE 15th OF THE MONTH FALLS ON A WEEKEND OR A HOLIDAY, THE LAST DAY TO FILE A VALID LIEN WILL BE THE EARLIEST BUSINESS DAY.

FOR CLAIMS RESULTING FROM A CONTRACT SIGNED AFTER JANUARY 1^ST, 2022
IF THE 15th OF THE MONTH FALLS ON A WEEKEND OR A HOLIDAY, THE LAST DAY TO FILE A VALID LIEN WILL EXTEND TO THE NEXT BUSINESS DAY AFTER THAT WEEKEND OR HOLIDAY.