The federal budget deficit for November was up sharply compared with a year ago, but much of the increase was blamed on a quirk of the calendar.

The Treasury Department reported Wednesday that the budget deficit for November totaled $98.2 billion, a record for the month. That was up 34.5 percent from a deficit of $73 billion set in November 2006.

However, government analysts noted that much of the increase reflected the fact that because Dec. 1 fell on a Saturday this year, about $17 billion in benefit payments were made early, shifting the impact into November.

The deficit for the first two months of the current budget year, which began on Oct. 1, totaled $153.8 billion, up 25.6 percent from the same period in the 2007 budget year.

Many private economists are forecasting that the deficit will rise this year under the impact of a weaker economy, which they expect to depress government revenues, and increased spending on the wars in Iraq and Afghanistan.

For the 2007 budget year, the deficit fell to five-year low of $162.8 billion. The Bush administration says its policies, if followed by the next administration, will erase the deficit completely. But private economists are predicting a relentless increase in red ink, reflecting the costs of war spending and rising costs for big government benefits programs such as Social Security and Medicare as 78 million baby boomers reach retirement age.

For the first two months of the 2008 budget year, receipts have totaled $329.2 billion, up 5 percent from the same two months last year. Government spending totaled $483 billion, an increase of 10.8 percent from the same period last year, although that gain reflected the shift in benefit payments into November instead of December.