The last month of 2023, December, is a critical time for a number of financial deadlines. Here are eight crucial dates to remember.Deadline for bank locker agreements:The Reserve Bank of India (RBI) has established a deadline of December 31, 2023, for the gradual execution of updated locker agreements. If youve submitted an altered bank locker agreement on or before December 31, 2022, you may have to sign and submit an updated agreement.The deadline for a free Aadhaar update is:According to a recent announcement from the Unique Identification Authority of India (UIDAI), anyone who hasnt updated their Aadhaar information in the previous ten years can do so for free till December 14. It is crucial to update the information to stop fraud connected to Aadhaar.Deadline for SBI Amrit Kalash:The Amrit Kalash special fixed deposit (FD) program has an extended deadline for investments, according to State Bank of India (SBI), the nations largest lender. Term deposits with interest rates higher than 7.10% are currently available to investors through December 31, 2023.The MF and demat nomination deadline is:A further three months have been granted to current owners of mutual fund units and demat accounts to offer a choice of nomination. According to a SEBI circular, the new deadline for submitting the nomination is December 31, 2023, after which the folios will be frozen.Inactive UPI IDs:Payment apps such as Paytm, Google Pay, PhonePe, and others, along with banks, have been directed by the National Payments Corporation of India (NPCI) to deactivate UPI IDs and numbers that have not been used for more than a year. Payment service providers (PSP) and Third Party App Providers (TPAP) have until December 31, 2023, according to the NPCI, to put this into effect.SBI home loan offer:SBI is currently offering a concession of up to 65 basis points (bps) on home loans as part of a special campaign. This concession is good until December 31, 2023, and it can be applied to a number of different kinds of home loans.IDBI special FD:The interest rates on fixed deposits under Rs 2 crore have been revised by IDBI Bank. Furthermore, the bank has extended the Amrit Mahotsav FD special savings accounts validity date by 375 days and 444 days, respectively. The 31st of December is the new deadline for these special fixed deposits.Indian Bank special FD:The public sector bank, Indian Bank, has increased the interest rates on its special fixed deposit offerings, called Ind Super 400 and Ind Supreme 300 days. The deadline for utilising these unique FDs has been moved up to December 31, 2023.