D.C. Mun. Regs. tit. 6, r. 6-B1132
Holiday premium pay shall not be paid unless specifically authorized by this section.
An employee who performs actual work within the hours of his or her scheduled daily tour of duty on a day designated as a holiday under § 1202 of the CMPA (D.C. Official Code § 1-612.02 (2001)), or established as an in-lieu-of day when the employee's regularly scheduled day off falls on a holiday, shall be entitled to pay at the rate of his or her rate of basic pay for the scheduled daily tour of duty plus premium pay paid at the employee's hourly rate of basic pay for each hour worked during the scheduled daily tour of duty.
An employee who is required to perform holiday work shall be entitled to a minimum of two (2) hours of holiday premium pay.
One-quarter (1/4) of an hour shall be the smallest fraction of an hour used for crediting holiday premium pay; but, when such work is performed in other than the full fraction, odd minutes shall be rounded up or rounded down to the nearest full fraction (i.e., quarter) of an hour.
An employee shall be entitled to pay for overtime work on a holiday at the same rate as for overtime work on other days.
An employee paid at grade 15 or above shall not be entitled to holiday premium pay.
Holiday premium pay under this section shall be in addition to other pay and shall not be considered basic pay for any purpose.
Holiday premium pay shall not be included in the rate of basic pay used to compute amounts of deductions for retirement and group life insurance.
D.C. Mun. Regs. tit. 6, r. 6-B1132