Abstract: A calendar comprising two sheets with one laid flat against the other and the sheets being moveable one over the other. One sheet bears the numbers “1” to “31” marked on it and the other sheet bears markings such that the numbers can be brought into registration with respective ones of the markings, successive markings being indicative of successive days of the week. Each month is represented by an indication on the sheet bearing the said markings adjacent to a marking indicative of that day of the week on which the first day of that month falls. Apertures are formed in the intended upper one of the sheets and further marks are provided on the intended underneath sheet such that when the indication of a given month on one of the sheets is brought adjacent to the number one on the other sheet, a mark appears through one of the apertures which is in registration with that number on the said one of the sheets which corresponds with the last day of the given month.

Abstract: A perpetual calendar for displaying a monthly calendar by aligning the desired monthly indicia with an appropriate yearly indicia. The calendar is based on a repeating five element pattern representing a four year repeating pattern, which, however, is modified for non-leap year centuries.

Abstract: A datable food storage container including a vessel having an upper mouth-defining structure, a vessel wall and a vessel bottom; a lid fixable to the upper mouth-defining structure, the lid having a top surface and a bottom surface, the lid having a lid cavity in the top surface; and a dating mechanism positioned in the lid cavity and releasably engaged with the lid, the dating mechanism including a plurality of generally cylindrical body members fixably rotatable about a common axis substantially parallel to the top surface of the lid, each of the body members having an outer surface which carries indicia, and a tubular shaft releasably engaged with the lid and extending through the cylindrical body members along the common axis such that the body members are fixably rotatable about the shaft.

Abstract: A perpetual calendar assembly includes a transparent outer cylinder having a first end portion, a mediate portion and a second end portion. A first opaque ring-shaped piece is mounted on the first end portion of the outer cylinder and longitudinally defines a first viewing slot. A second opaque ring-shaped piece is mounted on the second end portion of the outer cylinder and longitudinally defines a second viewing slot. A first inner cylinder is rotatably mounted in the outer cylinder and includes a first portion received in the first end portion of the outer cylinder and a second portion received in the mediate portion of the outer cylinder. A second inner cylinder is rotatably mounted in the outer cylinder and includes a first portion received in the second end portion of the outer cylinder and a second portion received in the mediate portion of the outer cylinder.

Abstract: A perpetual calendar has a cylindrical outer casing having several viewing apertures formed therein. The casing displays on an outer surface thereof in seven vertical columns the dates of the month from one to twenty-eight. One of the apertures is positioned to display up to three additional dates of the month after the numeral 28. An inner cylinder is rotatably mounted in the outer casing and coaxial therewith. This cylinder displays on an exterior surface thereof the 12 months of the year and also month ending date or dates for months having more than 28 days. This cylinder is rotatable to display the current month through one aperture and correct month ending date or dates for that month through another aperture. Also, a ring is mounted for rotation in the outer casing and is coaxial with this casing. The ring displays on its exterior surface data for indicating days of the week.

Abstract: A multiple year calendar device in which the year indicators of the calendar are locatable references and the days of multiple weeks are listed in chronologically sequential form for each such year indicator. Each of a year's twelve months and the numbered days thereof are registerable with a particular and singular listing of chronologically sequential days of weeks for a year indicator so as to provide for any specific numbered day of the month, the day of the week which such day occurs for the particular year desired. Such a calendar device to accomplish the aforementioned procedure may include one or more rotatable indexes, having on at least one of the indexes, the twelve months of the year and the numbered days thereof.

Abstract: A Biorythms analog computer-calendar is provided to display without computations the level of the physical, the emotional, and the intellectual biorythms of a human body. The level of the three biorythms appears on display in analog and digital forms for any dialed calendar date, if the computer-calendar is set initially with the individual's birth date. The analog elements used to register the three biorythm levels are drums attached to gears with a number of teeth equal or proportional to 23, 28 and 33, or to the period of the three biorythms respectively. A calendar arrangement is introduced to create a correlation between the displayed biorythm levels and the calendar date associated with them.

Abstract: First and second superposed members are mounted for relative back and forth movement along a predetermined path and one of the members has a generally rectangular window formed therein. The other of the members includes number indicia arranged in seriatim repetitively in coordinates of seven extending along the path with the coordinates spaced transversely of the path. The window is of a dimension transverse to the path to view the six laterally spaced coordinates of indicia therethrough and of a dimension longitudinally of the path to view seven indicia in each coordinate. A view masking panel is disposed intermediate the first and second members and includes a pair of elongated side-by-side indicia masking zones thereof extending along the path and including one pair of corresponding ends facing in one direction along the path and staggered lengthwise relative to the path a distance equivalent to at least seven of the indicia spaces.

Abstract: A desk calendar which permits the day, date and year to be changed by the simple manipulation of two dials, having, internally, a first and second shaft, each shaft controlling two rotatable drums. Each shaft has disposed thereon a first and second actuating member for operative engagement with a coupling device such that when the dialing member is turned in one direction the first drum will rotate and when the dial member is turned in the opposite direction the second drum will rotate. The same structure is related to the second shaft which is disposed on the other end of the frame having a separate dialing member associated therewith.